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Multiparticle azimuthal cumulants from transverse momentum conservation and collective flow

Physical Review C 2022年第5期105卷 054904-054904页

作者： Mu-Ting Xie Guo-Liang Ma Adam Bzdak Key Laboratory of Nuclear Physics and Ion-beam Application (MOE) Institute of Modern Physics Fudan University Shanghai 200433 China Shanghai Research Center for Theoretical Nuclear Physics NSFC and Fudan University Shanghai 200438 China AGH University of Science and Technology Faculty of Physics and Applied Computer Science 30-059 Kraków Poland

We calculate the nth order of 2k-particle azimuthal cumulants cn{2k} based on transverse momentum conservation (TMC) and collective flow vn (n=2,3). We demonstrate that the TMC effect only leads to a nonzero cn{2k} with the sign of (−1)nk and the magnitude inversely proportional to (N−2k)nk. The interplay between TMC and collective flow can change the signs of c2{4}, c3{2}, and c3{4} at some values of multiplicity N, which could provide a good probe to study the onset of collectivity and search for the substructure of proton in small colliding systems.

关键词： Collective flow Particle correlations & fluctuations Relativistic heavy-ion collisions

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A Parallel and Asynchronous Blob Shape Descriptor Implemented in CMOS technology

A Parallel and Asynchronous Blob Shape Descriptor Implemente...

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International Conference on Microelectronics, MIEL

作者： P. Bogacki M. Długosz T. Talaśka R. Długosz Aptiv Services Poland Kraków Poland Institute of Telecommunications Faculty of Computer Science Electronics and Telecommunications AGH University of Science and Technology Kraków Poland Faculty of Control Robotics and Electrical Engineering Institute of Automation and Robotics Division of Signal Processing and Electronic Systems Poznan University of Technology Poznan Poland Faculty of Telecommunication Computer Science and Electrical Engineering Bydgoszcz University of Science and Technology Bydgoszcz Poland

The paper presents a family of novel light blob shape descriptors for use in selected active safety algorithms used in Advanced Driver Assistance Systems (ADAS). One of the motivations was to obtain a descriptor that would ensure low computational complexity. This makes it easy to implement both in software and hardware. One assumption is that the location of the center of a given light spot is approximately known. The principle of its operation is then to count white pixels in selected directions, starting from this central point. A key issue here is an efficient way of determining indexes of particular pixels belonging to the image patch, as well as the location of points representing places where the white area turns into black. In the case of a hardware implementation, this can be done using a parallel circuit operating in asynchronous mode, without the need for a control clock.

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Higher order cumulants of transverse momentum and harmonic flow in relativistic heavy ion collisions

arXiv

引用

arXiv 2021年

作者： Bożek, Piotr Samanta, Rupam AGH University of Science and Technology Faculty of Physics and Applied Computer Science aleja Mickiewicza 30 Cracow30-059 Poland

Higher order symmetric cumulants of global collective observables in heavy ion collisions are studied. The symmetric cumulants can be straightforwardly constructed for scalar observables: the average transverse momentum, the multiplicity, and the squares of harmonic flow vectors. Third and fourth order cumulants are calculated in the hydrodynamic model. A linear predictor of the average transverse momentum and harmonic flow coefficients in a collision is used to predict the values of the cumulants from the moments of the initial distribution. The symmetric cumulants divided by the averages (or the standard deviations) of the considered observables can be used as a fine tool to study correlations present in the initial state of the collision. © 2021, CC BY.

关键词： Heavy ions

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Design of A Rotated 3D-Printed Lens Antenna Assembly with An Ultra-Wideband Antenna for Beam Steering Applications

Design of A Rotated 3D-Printed Lens Antenna Assembly with An...

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International Electrical Engineering Congress (iEECON)

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

ISBN: (数字)9798350383591

ISBN: (纸本)9798350383607

The paper presents the rotated 3D-printed dielectric lens assembly with an ultra-wideband (UWB) antenna for use in the beam-steering applications. The focus is on achieving beam steering by combining the rotated 3D-printed dielectric lens assembly with a hemispherical lens and UWB antenna. The UWB antenna is fabricated on an FR-4 substrate, while the hemispherical lens and the rotated 3D-printed lens assembly are made from Acrylonitrile Butadiene Styrene (ABS). To enable the hemispherical lens to rotate to the specified angle, a set of rotatable 3D-printed lenses was etched to determine five angles: -60degrees, -30degrees, 0degrees, 30degrees, and 60degrees. Both simulation and measurement results indicate that at a beginning frequency of 3.5 GHz, the beam cannot be steered when using the UWB antenna with the 3D-printed ABS lens rotated hemispherical lens assembly. However, at middle and high frequencies of 7.0 GHz and 10.0 GHz, respectively, the beam can be steered according to the direction of rotation of the hemispherical lens.

关键词： Antenna measurements Beam steering Ultra wideband antennas Frequency measurement Dielectrics High frequency Assembly

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Implementation of ML Algorithm for Mung Bean Classification using Smart Phone

Implementation of ML Algorithm for Mung Bean Classification ...

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2022 International Conference on Business Analytics for technology and Security, ICBATS 2022

作者： Shahid, Muhammad Munir, Kashif Muneer, Salman Mutiullah Jarrah, Muath Farooq, Umer Govt. Se College Department of Physics Bahawalpur Pakistan Khawaja Fareed University of Engineering and Information Technology Department of Computer Engineering Rahim Yar Khan Pakistan Ncbae School of Computer Science Lahore Pakistan Khawaja Fareed University of Engineering and Information Technology Faculty of Computer Science and Information Technology Rahim Yar Khan Pakistan Skyline University College University City Sharjah School of Information Technology Sharjah1797 United Arab Emirates Lahore Garrison University School of Computer Science Lahore Pakistan

ISBN: (纸本)9781665409209

This work is an extension of my work presented a robust and economically efficient method for the discrimination of four Mung-Beans varieties based on quantitative parameters, Due to the advancement of technology day by day users try to find the solutions to their daily life problems using smartphones but still there is limited resources are available in smartphone concerning computing power and memory so there is need to find the best classifier which can classify the Mung-Beans using already suggested features in previous work with minimum memory requirements and computational power. For achieving the goal of this study, we take the experiments on various supervised classifiers which have simple architecture and calculations and give the robust performance on the most relevant 10 suggested features are selected by Fisher Co-efficient, Probability of Error, Mutual Information, and wavelet features. After the analysis, we replace the Artificial Neural Network and Deep learning with such a classifier which gives approximately the same classification results as the above classifier but is efficient in terms of resources and time complexity. This classifier is easily implemented in the smartphone environment. © 2022 IEEE.

关键词： Smartphones

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Is Bcc Alloy Better than Fcc? Kinetics and Mechanisms of High-Temperature Oxidation of High-Carbon Fe-Based Alloys with Different Matrices

SSRN

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SSRN 2024年

作者： Wieczerzak, Krzysztof Stygar, Miroslaw Brylewski, Tomasz Chulist, Robert Bala, Piotr Michler, Johann Empa Swiss Federal Laboratories for Materials Science and Technology Laboratory of Mechanics of Materials and Nanostructures Feuerwerkerstrasse 39 ThunCH-3602 Switzerland AGH University of Science and Technology Faculty of Materials Science and Ceramics Al. A. Mickiewicza 30 Krakow30-059 Poland Institute of Metallurgy and Materials Science Polish Academy of Sciences Ul. Reymonta 25 Kraków30-059 Poland AGH University of Science and Technology Faculty of Metals Engineering and Industrial Computer Science Al. A. Mickiewicza 30 Krakow30-059 Poland

This study analyzes high-temperature oxidation and microstructural evolution in two high-alloy Fe-based alloys with high volume fraction of carbides with different matrices – body-centered cubic (BCC) and face-centered cubic (FCC). The results demonstrate that the BCC matrix alloy exhibits slower oxidation kinetics than the FCC counterpart, suggesting superior suitability for high-temperature applications. Both alloys developed adhesive oxide scales, primarily composed of Cr2O3, with the FCC alloy displaying greater scale spallation and cracking. Decarburization was observed in both alloys, progressing faster in the BCC matrix. This research emphasizes the importance of understanding these processes for the design of high-performance alloys for extreme conditions. © 2024, The Authors. All rights reserved.

关键词： Thermooxidation

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Electronic structure, electron-phonon coupling and superconductivity in noncentrosymmetric ThCoC2 from ab initio calculations

arXiv

引用

arXiv 2021年

作者： Kuderowicz, Gabriel Wójcik, Pawel Wiendlocha, Bartlomiej Faculty of Physics and Applied Computer Science AGH University of Science and Technology Aleja Mickiewicza 30 Krakow30-059 Poland

Superconductors without inversion symmetry in their crystal structure are known to exhibit unconventional properties. Recently, based on the measured temperature dependence of the magnetic field penetration depth, superconductivity in noncentrosymmetric ThCoC2 was proposed to be a nodal d-wave and mediated by the spin fluctuations. Moreover, a non-BCS behavior of the temperature dependence of the electronic specific heat and the magnetic upper critical field were reported. In this work, the electronic structure, phonons and electron-phonon coupling are studied in ThCoC2 on the basis of ab initio computations. The effect of the spin-orbit coupling on the electronic structure and electron-phonon interaction is analyzed, and a large splitting of the electronic band structure is found. The calculated electron-phonon coupling constant λ = 0.59 remains in decent agreement with the experimental estimates, suggesting that the electron-phonon interaction is strong enough to explain superconductivity with Tc 2.5 K. Nevertheless, we show that the conventional isotropic Eliashberg formalism is unable to describe the thermodynamic properties of the superconducting state, as calculated temperature dependence of the electronic specific heat and magnetic penetration depth deviate from experiments, which is likely driven by the strong spin-orbit coupling and inversion symmetry breaking. In addition, to shed more light on the pairing mechanism, we propose to measure the carbon isotope effect, as our calculations based on the electron-phonon coupling predict the observation of the isotope effect with an exponent α 0.15. Copyright © 2021, The Authors. All rights reserved.

关键词： Electron-phonon interactions

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First-Fit Coloring of Forests in Random Arrival Model

arXiv

引用

arXiv 2024年

作者： Bosek, Bartlomiej Gutowski, Grzegorz Lasoń, Michal Przybylo, Jakub Institute of Theoretical Computer Science Faculty of Mathematics and Computer Science Jagiellonian University Kraków Poland Institute of Mathematics The Polish Academy of Sciences ul. Śniadeckich 8 Warszawa00-656 Poland AGH University of Krakow Faculty of Applied Mathematics al. A. Mickiewicza 30 Kraków30-059 Poland

We consider a graph coloring algorithm that processes vertices in order taken uniformly at random and assigns colors to them using First-Fit strategy. We show that this algorithm uses, in expectation, at most (1 + o(1)) · ln n / ln ln n different colors to color any forest with n vertices. We also construct a family of forests that shows that this bound is best possible. © 2024, CC BY.

关键词： Random forests

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Intracellular Uptake of Magnetic Nanocapsules with Ionic Chitosan Shells and Magnetically Triggered Cargo Release

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Nanotechnology, science and Applications 2025年 18卷 263-275页

作者： Elżbieta Gumieniczek-Chłopek Joanna Odrobińska-Bali&sacute Adriana Gilarska Gabriela Opiła Manuel Ricardo Ibarra Czesław Kapusta Szczepan Zapotoczny Faculty of Physics and Applied Computer Science AGH University of Krakow Krakow Poland Jerzy Haber Institute of Catalysis and Surface Chemistry Polish Academy of Sciences Krakow Poland Faculty of Chemistry Jagiellonian University Krakow Poland Instituto de Nanociencia Y Materiales de Aragón (INMA) CSIC-Universidad de Zaragoza Laboratorio de Microscopías Avanzadas (LMA) Universidad de Zaragoza Zaragoza Spain

IntroductionDrug delivery systems typically need to be equipped with targeting moieties in order to be efficiently internalized by cells. Alternatively, magnetic nanoparticles (MNs) combined with active compounds may be driven by magnetic field to the site of action. Delivery of hydrophobic drugs using this approach is challenging as it would require coupling of MNs and hydrophobic environment within nanocarriers and triggering of the drug *** propose an approach enabling a magnetically induced forced uptake of core-shell nanocapsules carrying hydrophobic actives together with hydrophobized MNs. Such capsules, formed in a facile emulsification process, are composed of amphiphilic cationic or anionic chitosan (shell) and oil-dispersible MNs (oil core). The capsules were characterized using DLS, cryo-TEM. They were loaded with a model fluorescent dye, Nile Red, and pulled into cells applying a static magnetic field. Then, they were treated with an alternating magnetic field to disrupt the capsules thanks to the action of ***-TEM imaging confirmed the presence of MNs inside the capsules (d≈200 nm). Confocal microscopy imaging showed the efficient capsules’ intracellular uptake only after exposition to static magnetic field (some spontaneous uptake was observed for anionic capsules). Then, application of alternating magnetic fields induced rapture of the capsules inside the cells and release of the *** approach is very versatile as various lipophilic compounds could be encapsulated, then transported to desired tissues without active or passive targeting and kept there using static magnetic field, limiting undesired side effects of a therapy to the whole organism. The proposed capsules with MNs respond efficiently to magnetic field stimulation – they can be magnetically navigated into the cells and release their cargo after application of alternating magnetic field. This approach opens opportunities for controlled intracellular

关键词： magnetic nanoparticles drug delivery systems nanocarriers nanomedicine iron oxide nanoparticles polymer capsules

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Estimation of proportions of SARS-CoV-2 variants in a mixed sequencing sample 21

Estimation of proportions of SARS-CoV-2 variants in a mixed ...

引用

21st Conference Information Technologies - Applications and Theory, ITAT 2021

作者： Gafurov, Askar Baláž, Andrej Vinař, Tomáš Brejová, Broňa Department of Computer Science Faculty of Mathematics Physics and Informatics Comenius University Bratislava Slovakia Department of Applied Informatics Faculty of Mathematics Physics and Informatics Comenius University Bratislava Slovakia

Estimation of proportions of SARS-CoV-2 genome variants (e.g. variant B.1.1.7 originating from Britain, variant B.1.351 originating from South-Africa) in a population is currently done by sequencing individual samples, which demands individual laboratory processing of each sample. This labor can be significantly reduced by mixing several samples together and processing them in one batch. Our project aims to estimate the proportion of samples with given variants from such mixtures using probabilistic modeling. Copyright © 2021 for this paper by its authors.

关键词： Coronavirus

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