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arXiv 2025年

作者： Veřtát, P. Zelený, M. Sozinov, A. Klicpera, M. Fabelo, O. Chulist, R. Vinogradova, M. Sedlák, P. Seiner, H. Heczko, O. Straka, L. FZU Institute of Physics of the Czech Academy of Sciences Prague Czech Republic Institute of Materials Science and Engineering Faculty of Mechanical Engineering Brno University of Technology Brno Czech Republic Material Physics Laboratory Lappeenranta-Lahti University of Technology LUT Lappeenranta Finland Department of Condensed Matter Physics Faculty of Mathematics and Physics Charles University Prague Czech Republic Institut Laue-Langevin Grenoble France Faculty of Metals Engineering and Industrial Computer Science AGH University of Science and Technology Krakow Poland Institute of Thermomechanics of the Czech Academy of Sciences Prague Czech Republic

Understanding the crystal structure of magnetic shape memory alloys is crucial for elucidating their martensite twin boundary supermobility and related functionalities. This study analyzes and discusses the structure of martensitic single crystals of Ni50.0Mn27.7Ga22.3 and Ni50.0Mn28.1Ga21.9. Neutron and X-ray diffraction reveal an anharmonic, incommensurate five-layer modulation that evolves with temperature. This evolution gives rise to two key microstructural features: i) periodic nanodomains, identified as emerging a/b-nanotwins, and ii) long-period commensurate structures, such as the 34O, 24O, and 14O states, whose orthorhombic unit cells inherently realize a/b-nanotwins. Ab initio calculations show that these long-period structures are energetically favorable, leading to a lock-in transition. In the alloys studied, the 24O state is the locked-in phase at low temperatures, whereas literature data indicate that Ni50Mn25Ga25 (exact Ni2MnGa stoichiometry) evolves toward the 14O phase. Crucially, these results unify two seemingly contrasting structural descriptions—wave-like modulation and discrete nanotwinning—thereby establishing a foundation for a deeper understanding of the crystal-structure–functionality relationship in magnetic shape memory alloys. © 2025, CC BY.

关键词： Magnetic shape memory

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Simulations of Cosmic Ray Ensembles originated nearby the Sun 37

Simulations of Cosmic Ray Ensembles originated nearby the Su...

引用

37th International Cosmic Ray Conference, ICRC 2021

作者： Alvarez-Castillo, David E. Homola, Piotr Gora, Dariusz Opila, Gabriela Medrala, Justyna Poncyljusz, Bożena Sushchov, Oleksandr Beznosko, Dmitriy Budnev, Nikolai Gupta, Alok C. Hnatyk, Bohdan Kasztelan, Marcin Kovacs, Peter Lozowski, Bartosz Medvedev, Mikhail V. Miszczyk, Justyna Mozgova, Alona Nazari, Vahab Niedźwiecki, Michal Pawlik, Maciej Rosas, Matías Rzecki, Krzysztof Smelcerz, Katarzyna Smolek, Karel Stasielak, Jaroslaw Stuglik, Slawomir Svanidze, Manana Tursunov, Arman Verbetsky, Yuri Wibig, Tadeusz Zamora-Saa, Jilberto Bibrzyck, Lukasz Piekarczyk, Marcin Institute of Nuclear Physics Polish Academy of Sciences Radzikowskiego 152 Kraków31-342 Poland Joint Institute for Nuclear Research Dubna141980 Russia Clayton State University MorrowGA United States Irkutsk State University Russia Manora Peak Nainital263001 India Astronomical Observatory of Taras Shevchenko National University of Kyiv Kyiv04053 Ukraine National Centre for Nuclear Research Andrzeja Soltana 7 Świerk Otwock05-400 Poland Institute for Particle and Nuclear Physics Wigner Research Centre for Physics Konkoly-Thege Miklós út 29-33 Budapest1121 Hungary Faculty of Natural Sciences University of Silesia in Katowice Bankowa 9 Katowice40-007 Poland Department of Physics and Astronomy University of Kansas LawrenceKS66045 United States Laboratory for Nuclear Science Massachusetts Institute of Technology CambridgeMA02139 United States Department of Computer Science Faculty of Computer Science and Telecommunications Cracow University of Technology Warszawska 24 Kraków31-155 Poland ACC Cyfronet AGH-UST Kraków30-950 Poland AGH University of Science and Technology Mickiewicz Ave. Kraków30-059 Poland Liceo 6 Francisco Bauzá Montevideo Uruguay Institute of Experimental and Applied Physics Czech Technical University Prague Czech Republic E. Andronikashvili Institute of Physics Tbilisi State University Georgia Research Centre for Theoretical Physics and Astrophysics Institute of Physics Silesian University in Opava Bezručovo nám. 13 OpavaCZ-74601 Czech Republic University of Lódź Faculty of Physics and Applied Informatics Pomorska 149/153 Lódź90-236 Poland Universidad Andres Bello Departamento de Ciencias Fisicas Facultad de Ciencias Exactas Avenida Republica 498 Santiago Chile Faculty of Physics University of Warsaw Warsaw02-093 Poland Faculty of Physics and Applied Computer Science AGH University of Science and Technology Cracow30-059 Poland Pedagogical University of Krakow Institute of Computer Science ul. Podchorażych Kraków3

Cosmic Ray Ensembles (CRE) are yet not observed groups of cosmic rays with a common primary interaction vertex or the same parent particle. One of the processes capable of initiating identifiable CRE is an interaction of an ultra-high energy (UHE) photon with the solar magnetic field which results in an electron pair production and the subsequent synchrotron radiation. The resultant electromagnetic cascade forms a very characteristic line-like front of a very small width (∼ meters), stretching from tens of thousands to even many millions of kilometers. In this contribution we present the results of applying a toy model to simulate detections of such CRE at the ground level with an array of ideal detectors of different dimensions. The adopted approach allows us to assess the CRE detection feasibility for a specific configuration of a detector array. The process of initiation and propagation of an electromagnetic cascade originated from an UHE photon passing near the Sun, as well as the resultant particle distribution on ground, were simulated using the CORSIKA program with the PRESHOWER option, both modified accordingly. The studied scenario results in photons forming a cascade that extends even over tens of millions of kilometers when it arrives at the top of the Earth's atmosphere, and the photon energies span practically the whole cosmic ray energy spectrum. The topology of the signal consists of very extended CRE shapes, and the characteristic, very much elongated disk-shape of the particle distribution on ground illustrates the potential for identification of CRE of this type. © Copyright owned by the author(s) under the terms of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License (CC BY-NC-ND 4.0)

关键词： Cosmic rays

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Multimodal Analysis of Traction Forces and Temperature Dynamics of Living Cells with Diamond-Embedded Substrate

arXiv

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arXiv 2024年

作者： Kolodziej, Tomasz Mrózek, Mariusz Sengottuvel, Saravanan Glowacki, Maciej J. Ficek, Mateusz Gawlik, Wojciech Rajfur, Zenon Wojciechowski, Adam Jagiellonian University Medical School Faculty of Pharmacy Kraków Poland Jagiellonian University Faculty of Physics Astronomy and Applied Computer Science Kraków Poland Gdansk University of Technology Faculty of Electronics Telecommunications and Informatics Department of Metrology and Optoelectronics Gdańsk Poland

Cells and tissues are constantly exposed to various chemical and physical signals that intricately regulate various physiological and pathological processes. This study explores the integration of two biophysical methods, Traction Force Microscopy (TFM) and Optically-Detected Magnetic Resonance (ODMR), to concurrently assess cellular traction forces and local relative temperature. We present a novel elastic substrate with embedded nitrogen-vacancy microdiamonds, that facilitate ODMR-TFM measurements. Optimization efforts have focused on minimizing the sample illumination and experiment duration to mitigate biological perturbations. Our hybrid ODMR-TFM technique yields precise TFM maps and achieves approximately 1K accuracy in relative temperature measurements. Notably, our setup, employing a simple wide-field fluorescence microscope with standard components, demonstrates the broader feasibility of these techniques in life-science laboratories. By elucidating the physical aspects of cellular behavior beyond the existing methods, this approach opens avenues for a deeper understanding and may inspire diverse biomedical applications. © 2024, CC BY.

关键词： Temperature measurement

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Exploring non-standard Hbb interactions at future electron-proton colliders

arXiv

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arXiv 2023年

作者： Haghighat, Gholamhossein Jafari, Reza Khanpour, Hamzeh Najafabadi, Mojtaba Mohammadi P.O. Box 19395-5531 Tehran Iran Department of Physics University of Tehran North Karegar Avenue Tehran14395-547 Iran AGH University Faculty of Physics and Applied Computer Science Al. Mickiewicza 30 Kraków30-055 Poland Department of Physics University of Science and Technology of Mazandaran P.O.Box 48518-78195 Behshahr Iran

In this paper, we use the charged-current Higgs boson production process at future electronproton colliders, e-p → Hjve, with the subsequent decay of the Higgs boson into a bb pair, to probe the Standard Model effective field theory with dimension-six operators involving the Higgs boson and the bottom quark. The study is performed for two proposed future highenergy electron-proton colliders, the Large Hadron Electron Collider (LHeC) and the Future Circular Collider (FCC-he) at the center-of-mass energies of 1.3 TeV and 3.46 TeV, respectively. Constraints on the CP-even and CP-odd Hbb couplings are derived by analyzing the simulated signal and background samples. A realistic detector simulation is performed and a multivariate technique using the gradient Boosted Decision Trees algorithm is employed to discriminate the signal from background. Expected limits are obtained at 95% Confidence Level for the LHeC and FCC-he assuming the integrated luminosities of 1, 2 and 10 ab-1. We find that using 1 ab-1 of data, the CP-even and CP-odd Hbb couplings can be constrained with accuracies of the order of 10-3 and 10-2, respectively, and a significant region of the unprobed parameter space becomes accessible. Copyright © 2023, The Authors. All rights reserved.

关键词： Electrons

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Magnetoresitance vs. Electronic Structure in Cu Doped Single Crystalline Bi2se3 3d Topological Insulator

SSRN

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SSRN 2023年

作者： Chrobak, Maciej Maćkosz, Krzysztof Nowak, Kamil Naumov, Andrii Przybylski, Marek Faculty of Physics and Applied Computer Science AGH University of Krakow Mickiewicza Av. 30 Krakow30-059 Poland Academic Centre for Materials and Nanotechnology AGH University of Krakow Mickiewicza Av. 30 Krakow30-059 Poland Empa-Swiss Federal Laboratories for Materials Science and Technology Laboratory for Mechanics of Materials and Nanostructures Feuerwerkerstrasse 39 ThunCH-3602 Switzerland

Bismuth selenide (Bi2Se3) is one of the 3D topological insulators (TI) that can be characterised as materials of a semiconducting volume and a conductive surface. The evolution of the electronic structure of (Bi1−xCux)2Se3 (x=0, 0.025, 0.05, 0.09 and 0.125) was investigated by angle-resolved photoemission spectroscopy (ARPES), scanning tunnelling microscopy (STM/STS) and Shubnikov-de Haas oscillations (SdH). The results show that doping with Cu does not change the electronic structure, in particular it does not destroy the nontrivial topology of the system. The lack of superconductivity is discussed in view of intercalated CuxBi2Se3 in which superconductivity is observed. © 2023, The Authors. All rights reserved.

关键词： Bismuth compounds

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Energy dependence of proton-proton elastic scattering at large momentum transfer

arXiv

引用

arXiv 2023年

作者： Ferreira, Erasmo Kohara, Anderson Kendi Instituto de Física Universidade Federal do Rio de Janeiro C.P. 68528 Rio de Janeiro Rio de Janeiro21945-970 Brazil AGH University Of Science and Technology Faculty of Physics and Applied Computer Science Mickiewicza 30 Kraków30-059 Poland

The measurements of proton-proton elastic scattering for large momentum transfer at energies in the range ≈ 20 to 60 GeV show a simple behaviour of form dσ/dt ≈ const |t|−8, apparently with no energy dependence. In the present work detailed analysis of the data shows a decrease of the magnitude of the tail with the energy, still with preservation of the power |t|−8. The analysis allows the definition of a band for the energy dependence of the amplitude with central line A(√s) = 0.389 log (100)/ log √s GeV6 . The rate of decrease describes well the data at the distant energy √s = 13 TeV, with reduction of the cross section by a factor 5.71. This result gives prediction for new experiments at high energies, and opens important question for theoretical investigation. Copyright © 2023, The Authors. All rights reserved.

关键词： Elastic scattering

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Effect of symmetry breaking of polarized light sea quarks on the nucleon and nuclear structure functions, and sum rules

引用

Physical Review C 2023年第3期108卷 035203-035203页

作者： Fatemeh Arbabifar Shahin Atashbar Tehrani Hamzeh Khanpour Department of Physics Education Farhangian University P.O. Box 14665-889 Tehran Iran School of Particles and Accelerators Institute for Research in Fundamental Sciences (IPM) P.O. Box 19395-5531 Tehran Iran AGH University of Science and Technology Faculty of Physics and Applied Computer Science Al. Mickiewicza 30 30-055 Krakow Poland Department of Physics University of Science and Technology of Mazandaran P.O. Box 48518-78195 Behshahr Iran

In this study, we performed calculations and analyses of the structure functions of polarized nucleons and light nuclei, specifically He3 and H3, using second-order Feynman diagrams. Our investigation focused on two main aspects: First, we examined the symmetry properties of polarized light sea quarks. Second, we conducted a detailed investigation into the impacts of symmetry breaking on the structure functions of both nucleons and nuclei. To achieve this, we utilized the existing polarized parton distribution functions (polarized PDFs) available in the literature. These PDFs were used to calculate and compare the polarized structure functions g1 and g2 of the nuclei. Additionally, we examined and analyzed the Bjorken and Efremov-Leader-Teryaev sum rules by utilizing the moments of the polarized structure functions. The Lorentz color force components, namely FEy,n and FBy,n, were determined using the twist-2, twist-3, and twist-4 matrix elements. When symmetry breaking is applied, it is observed that they have similar magnitudes but opposite signs. Our theoretical predictions for the polarized structure functions of nucleons and light nuclei, taking into account the symmetry breaking of light sea quarks, exhibit better agreement with experimental data.

关键词： Deep inelastic scattering Perturbative QCD Polarization phenomena QCD in nuclear reactions A ≤ 5

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Performance Comparison of Various Dual-Band AMC Structures Using Textile Materials

Performance Comparison of Various Dual-Band AMC Structures U...

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International Electrical Engineering Congress (iEECON)

作者： Yotrawee Hengroemyat Wanwisa Thaiwirot Prayoot Akkaraekthalin Nonchanutt Chudpooti Department of Electrical and Computer Engineering Faculty of Engineering King Mongkut’s University of Technology North Bangkok Bangkok Thailand Department of Industrial Physics and Medical Instrumentation Faculty of Applied Science King Mongkut’s University of Technology North Bangkok Bangkok Thailand

ISBN: (数字)9798331543952

ISBN: (纸本)9798331543969

This paper presents the performance comparison of various dual-band AMC structures using textile materials. The textile AMC structure includes of the inner patch and outer loop to achieve dual-band operation. The felt is used as substrate of AMC unit cell while the copper-nickel plated polyester fabric is used as conductive parts. The various geometries of AMC unit cell based on square, circle, hexagon, octagon shapes are designed to operate at 2.4/5.5 GHz for WBAN and Wi-Fi applications. Moreover, the performance of AMC unit cell structures is compared in term of size and bandwidth. It is found from simulation results that the inner square patch and outer square loop can provide compact size and wider bandwidth. The hexagon shape can achieve compact size when it is arranged in form of array.

关键词： Geometry Wireless communication Shape Simulation Dual band Bandwidth Reflector antennas Substrates Wireless fidelity Textiles

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Kolmogorov-Arnold Networks for metal surface defect classification

arXiv

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arXiv 2025年

作者： Krzywda, Maciej Wermiński, Mariusz Lukasik, Szymon Gandomi, Amir H. AGH University of Krakow Faculty of Physics and Applied Computer Science al. A. Mickiewicza 30 Krakow30-059 Poland AGH University of Krakow Faculty of Metals Engineering and Industrial Computer Science al. A. Mickiewicza 30 Krakow30-059 Poland Systems Research Institute Polish Academy of Sciences ul. Newelska 6 Warsaw01-447 Poland Faculty of Engineering and IT University of Technology Sydney 5 Broadway UltimoNSW2007 Australia Óbuda University Bécsi út 96/B Budapest1034 Hungary NASK National Research Institute ul. Kolska 12 Warsaw01-045 Poland

This paper presents the application of Kolmogorov-Arnold Networks (KAN) in classifying metal surface defects. Specifically, steel surfaces are analyzed to detect defects such as cracks, inclusions, patches, pitted surfaces, and scratches. Drawing on the Kolmogorov-Arnold theorem, KAN provides a novel approach compared to conventional multilayer perceptrons (MLPs), facilitating more efficient function approximation by utilizing spline functions. The results show that KAN networks can achieve better accuracy than convolutional neural networks (CNNs) with fewer parameters, resulting in faster convergence and improved performance in image classification. © 2025, CC BY.

关键词： Surface defects

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Performance Comparison of Various Dual-Band AMC Structures Using Textile Materials

Performance Comparison of Various Dual-Band AMC Structures U...

引用

13th International Electrical Engineering Congress, iEECON 2025

作者： Hengroemyat, Yotrawee Thaiwirot, Wanwisa Akkaraekthalin, Prayoot Chudpooti, Nonchanutt King Mongkut's University of Technology North Bangkok Faculty of Engineering Department of Electrical and Computer Engineering Bangkok Thailand King Mongkut's University of Technology North Bangkok Faculty of Applied Science Department of Industrial Physics and Medical Instrumentation Bangkok Thailand

ISBN: (纸本)9798331543952

关键词： Linen

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