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Wealth rheology

arXiv 2021年

作者： Burda, Zdzislaw Krawczyk, Malgorzata J. Malarz, Krzysztof Snarska, Malgorzata AGH University of Science and Technology Faculty of Physics and Applied Computer Science Mickiewicza 30 KrakówPL-30059 Poland Cracow University of Economics Department of Financial Markets Rakowicka 27 KrakówPL-31510 Poland

We study wealth rank correlations in a simple model of macroeconomy. To quantify rank correlations between wealth rankings at different times, we use Kendall's t and Spearman's r, Goodman-Kruskal's γ, and the lists' overlap ratio. We show that the dynamics of wealth flow and the speed of reshuffling in the ranking list depend on parameters of the model controlling the wealth exchange rate and the wealth growth volatility. As an example of the rheology of wealth in real data, we analyze the lists of the richest people in Poland, Germany, the USA and the world. © 2021, CC BY.

关键词： Elasticity

Critical Growth of Cerebral Tissue in Organoids: Theory and Experiments

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Physical Review Letters 2023年第17期131卷 178402-178402页

作者： Egor I. Kiselev Florian Pflug Arndt von Haeseler Center for Integrative Bioinformatics Vienna (CIBIV) Max Perutz Laboratories University of Vienna and Medical University of Vienna Vienna Bio Center (VBC) 1030 Vienna Austria Physics Department Technion 320003 Haifa Israel Biological Complexity Unit Okinawa Institute of Science and Technology Graduate University Onna Okinawa 904-0495 Japan Bioinformatics and Computational Biology Faculty of Computer Science University of Vienna 1090 Vienna Austria

We develop a Fokker-Planck theory of tissue growth with three types of cells (symmetrically dividing, asymmetrically dividing, and nondividing) as main agents to study the growth dynamics of human cerebral organoids. Fitting the theory to lineage tracing data obtained in next generation sequencing experiments, we show that the growth of cerebral organoids is a critical process. We derive analytical expressions describing the time evolution of clonal lineage sizes and show how power-law distributions arise in the limit of long times due to the vanishing of a characteristic growth scale. We discuss that the independence of critical growth on initial conditions could be biologically advantageous.

关键词： Anomalous diffusion Genomics Levy flights Population genetics Brain Tissues Fokker–Planck equation Self-organized criticality

Experimental studies of the three nucleon system dynamics in the proton induced deuteron breakup at 108 MeV

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arXiv 2024年

作者： Lobejko, A. Stephan, E. Ciepal, I. Golak, J. Kalantar-Nayestanaki, N. Kistryn, S. Klos, B. Kozela, A. Kulessa, P. Parol, W. Skibiński, R. Skwira-Chalot, I. Szadziński, A. Wilczek, A. Witala, H. Wloch, B. Zejma, J. Institute of Physics University of Silesia ChorzówPL-41500 Poland Institute of Experimental Physics Faculty of Mathematics Physics and informatics University of Gdańsk GdańskPL-80308 Poland Institute of Nuclear Physics PAS KrakówPL-31342 Poland Faculty of Physics Astronomy and Applied Computer Science Jagiellonian University KrakówPL-30348 Poland ESRIG University of Groningen Groningen9747 AA Netherlands Faculty of Physics University of Warsaw WarszawaPL-02093 Poland Université de Bordeaux CNRS LP2I Bordeaux GradignanFR-33170 France

The differential cross sections for the 2H(p,pp)n reaction have been measured for 84 angular configurations of the outgoing protons in the range of polar angles from 13 to 33 degrees with a proton beam of 108 MeV. Data have been collected in the Cyclotron Center Bronowice (CCB) at the Institute of Nuclear physics PAS in Cracow, using the BINA detector setup. Analysis leading to determination of the breakup cross section values is described. Absolute normalization is obtained by normalization to the simultaneously measured 2H(p,d)p scattering *** results are compared to the state-of-the-art theoretical calculations. Global analysis shows significant influence of the Coulomb interaction and small effects of three nucleon force in the studied phase space region. © 2024, CC BY.

关键词： Phase space methods

Anisotropy of the spin-orbit coupling driven by a magnetic field in InAs nanowires

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Physical Review B 2021年第8期103卷 085434-085434页

作者： Paweł Wójcik Andrea Bertoni Guido Goldoni AGH University of Science and Technology Faculty of Physics and Applied Computer Science Al. Mickiewicza 30 30-059 Krakow Poland CNR-NANO S3 Istituto Nanoscienze Via Campi 213/a 41125 Modena Italy Department of Physics Informatics and Mathematics University of Modena and Reggio Emilia Via Campi 213/a 41125 Modena Italy

We use the k·p theory and the envelope function approach to evaluate the Rashba spin-orbit coupling induced in a semiconductor nanowire by a magnetic field at different orientations, taking explicitly into account the prismatic symmetry of typical nanocrystals. We make the case for the strongly spin-orbit-coupled InAs semiconductor nanowires and investigate the anisotropy of the spin-orbit constant with respect to the field direction. At sufficiently high magnetic fields perpendicular to the nanowire, a sixfold anisotropy results from the interplay between the orbital effect of field and the prismatic symmetry of the nanowire. A backgate potential, breaking the native symmetry of the nanocrystal, couples to the magnetic field inducing a twofold anisotropy, with the spin-orbit coupling being maximized or minimized depending on the relative orientation of the two fields. We also investigate in-wire field configurations, which shows a trivial twofold symmetry when the field is rotated off the axis. However, isotropic spin-orbit coupling is restored if a sufficiently high gate potential is applied. Our calculations are shown to agree with recent experimental analysis of the vectorial character of the spin-orbit coupling for the same nanomaterial, providing a microscopic interpretation of the latter.

关键词： Rashba coupling Spin-orbit coupling III-V semiconductors Nanowires k dot p method

Pilot Study on the Measurement of the Production of Boron Isotopes in C+p Reactions at 13.5AGeV/c with NA61/SHINE 38

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Pilot Study on the Measurement of the Production of Boron Is...

38th International Cosmic Ray Conference, ICRC 2023

作者： Amin, Neeraj Adhikary, H. Adrich, P. Allison, K.K. Amin, N. Andronov, E.V. Antićić, T. Arsene, I.-C. Bajda, M. Balkova, Y. Baszczyk, M. Battaglia, D. Bazgir, A. Bhosale, S. Bielewicz, M. Blondel, A. Bogomilov, M. Bondar, Y. Brandin, A. Bryliński, W. Brzychczyk, J. Buryakov, M. Camino, A.F. Ćirković, M. Csanád, M. Cybowska, J. Czopowicz, T. Dalmazzone, C. Davis, N. Dmitriev, A. von Doetinchem, P. Dominik, W. Dorosz, P. Dumarchez, J. Engel, R. Feofilov, G.A. Fields, L. Fodor, Z. Friend, M. Gaździcki, M. Golosov, O. Golovatyuk, V. Golubeva, M. Grebieszkow, K. Guber, F. Igolkin, S.N. Ilieva, S. Ivashkin, A. Izvestnyy, A. Kadija, K. Kargin, N. Karpushkin, N. Kashirin, E. Kielbowicz, M. Kireyeu, V.A. Kolesnikov, R. Kolev, D. Koshio, Y. Kovalenko, V.N. Kowalski, S. Kozlowski, B. Krasnoperov, A. Kucewicz, W. Kuchowicz, M. Kuich, M. Kurepin, A. László, A. Lewicki, M. Lykasov, G. Lyubushkin, V.V. Maćkowiak-Pawlowska, M. Majka, Z. Makhnev, A. Maksiak, B. Malakhov, A.I. Marcinek, A. Marino, A.D. Mathes, H.-J. Matulewicz, T. Matveev, V. Melkumov, G.L. Merzlaya, A. Mik, L. Morawiec, A. Morozov, S. Nagai, Y. Nakadaira, T. Naskręt, M. Nishimori, S. Olivier, A. Ozvenchuk, V. Panova, O. Paolone, V. Petukhov, O. Pidhurskyi, I. Planeta, R. Podlaski, P. Popov, B.A. Pórfy, B. Posiadala-Zezula, M. Prokhorova, D.S. Pszczel, D. Pulawski, S. Puzović, J. Renfordt, R. Ren, L. Reyna Ortiz, V.Z. Röhrich, D. Rondio, E. Roth, M. Rozplochowski, L. Rumberger, B.T. Rumyantsev, M. Rustamov, A. Rybczynski, M. Rybicki, A. Sakashita, K. Schmidt, K. Yu. Seryakov, A. Seyboth, P. Shah, U.A. Shiraishi, Y. Shukla, A. Slodkowski, M. Staszel, P. Stefanek, G. Stepaniak, J. Strikhanov, M. Ströbele, H. Šuša, T. Świderski, L. Szewiński, J. Szukiewicz, R. Taranenko, A. Tefelska, A. Tefelski, D. Tereshchenko, V. Toia, A. Tsenov, R. Turko, L. Tveter, T.S. Unger, M. Urbaniak, M. Valiev, F.F. Veberič, D. Vechernin, V.V. Volkov, V. Wickremasinghe, A. Wójcik, K. Wyszyński, O. Zaitsev, A. Zimmerman, E.D. Zviagina, A. Zwaska, R. Karlsruhe Institute of Technology Institute for Astroparticle Physics Karlsruhe Germany National Nuclear Research Center Baku Azerbaijan Faculty of Physics University of Sofia Sofia Bulgaria Ruđer Bošković Institute Zagreb Croatia LPNHE Sorbonne University CNRS IN2P3 Paris France Karlsruhe Institute of Technology Karlsruhe Germany University of Frankfurt Frankfurt Germany Wigner Research Centre for Physics Budapest Hungary Eötvös Loránd University Budapest Hungary Institute for Particle and Nuclear Studies Tsukuba Japan Okayama University Japan University of Bergen Bergen Norway University of Oslo Oslo Norway Jan Kochanowski University Kielce Poland Institute of Nuclear Physics Polish Academy of Sciences Cracow Poland National Centre for Nuclear Research Warsaw Poland Jagiellonian University Cracow Poland AGH - University of Science and Technology Cracow Poland University of Silesia Katowice Poland University of Warsaw Warsaw Poland University of Wroclaw Wroclaw Poland Warsaw University of Technology Warsaw Poland CERN France University of Belgrade Belgrade Serbia Fermilab Batavia United States University of Notre Dame Notre Dame United States University of Colorado Boulder United States University of Hawaii at Manoa Honolulu United States University of Pittsburgh Pittsburgh United States

The current understanding of cosmic-ray propagation in the Galaxy is significantly hindered by the inadequate knowledge of nuclear fragmentation cross-sections, while the other key component, the secondary cosmic-ray fluxes are measured with high precision by space-based detectors. This situation can be redressed by utilizing NA61/SHINE, a fixed-target experimental facility at CERN. Pilot data on fragmentation was taken in the year 2018 with the main goal of probing the feasibility of performing fragmentation studies at SPS energies. Two fixed targets, polyethylene (C2H4) and graphite were employed to study C+p interactions at 13.5AGeV/c beam momentum. In this contribution, we will present the preliminary measurement of the direct production of isotopes of boron 10B and 11B in C+p interactions at NA61/SHINE. © Copyright owned by the author(s) under the terms of the Creative Commons.

关键词： Cosmology

On the stress transit function

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arXiv 2025年

作者： Anil, Arun Changat, Manoj Dravec, Tanja Jacob, Jeny Sheela, Lekshmi Kamal K. Peterin, Iztok Repolusk, Polona Singh, Rishi Ranjan Department of Futures Studies University of Kerala Thiruvananthapuram695581 India University of Maribor Faculty of Natural Sciences and Mathematics Koroška 160 Maribor2000 Slovenia Institute of Mathematics Physics and Mechanics Jadranska 19 Ljubljana1000 Slovenia University of Maribor Faculty of Electrical Engineering and Computer Science Koroška 46 Maribor2000 Slovenia Department of Computer Science & Engineering Indian Institute of Technology Chhattisgarh Bhilai491002 India MITS Ernakulam APJ Abdul Kalam Technological University Kerala India

The stress interval S(u, v) between u, v ∈ V (G) is the set of all vertices in a graph G that lie on every shortest u, v-path. A set U ⊆ V (G) is stress convex if S(u, v) ⊆ U for any u, v ∈ U. A vertex v ∈ V (G) is s-extreme if V (G)−v is a stress convex set in G. The stress number sn(G) of G is the minimum cardinality of a set U where ∪u,v∈U S(u, v) = V (G). The stress hull number sh(G) of G is the minimum cardinality of a set whose stress convex hull is V (G). In this paper, we present many basic properties of stress intervals. We characterize s-extreme vertices of a graph G and construct graphs G with arbitrarily large difference between the number of s-extreme vertices, sh(G) and sn(G). Then we study these three invariants for some special graph families, such as graph products, split graphs, and block graphs. We show that in any split graph G, sh(G) = sn(G) = |Exts(G)|, where Exts(G) is the set of s-extreme vertices of G. Finally, we show that for k ∈ , deciding whether sn(G) ≤ k is NP-complete problem, even when restricted to bipartite graphs. © 2025, CC BY.

关键词： Graph theory

Secrecy Outage Probability of Full-Duplex Relaying Vehicular Networks

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Secrecy Outage Probability of Full-Duplex Relaying Vehicular...

Japan-Egypt International Conference on Electronics, Communications and computers (JEC-ECC)

作者： Mohamed G. Abd El Ghafour Ahmed H. Abd El-Malek Ola E. Hassan Mohammed Abo-Zahhad Department of Engineering Mathematics and Physics Faculty of Engineering Alexandria University Alexandria Egypt School of Electronics Communications & Computer Engineering Egypt-Japan University of Science & Technology Alexandria Egypt Basic and Applied Science Department Arab Academy For Science Technology & Maritime Transport Smart Village Campus Giza Egypt Electrical Engineering Department Faculty of Engineering Assiut University Assiut Egypt

ISBN: (纸本)9781665464642

This paper investigates the secrecy performance of full-duplex cooperative vehicular relaying networks under passive eavesdropping attacks in the presence of co-channel interference. In the considered system model, a static source communicates with a static destination through a mobile full-duplex relay in the presence of a mobile passive eavesdropper and a static co-channel interferer. A closed-form expression for the exact secrecy outage probability of the system is derived for the Nakagami-m fading environment. Hence, the asymptotic secrecy outage probability is obtained at high signal-to-noise values. Numerical and Simulation results are obtained to validate the derived analytical expressions.

关键词： Fading channels Wireless communication Closed-form solutions Interference cancellation Simulation Full-duplex system Probability

One-loop gauge invariant amplitudes with a space-like gluon

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arXiv 2022年

作者： Blanco, Etienne Giachino, Alessandro van Hameren, Andreas Kotko, Piotr Institute of Nuclear Physics Polisch Academy of Sciences KrakówPL-31342 Poland AGH University Of Science and Technology Physics Faculty S. Mickiewicza 30 Kraków30-059 Poland

Nowadays the particle physics has entered an era where high precision calculations are required in order to compare the theoretical predictions with the experimental data. In this paper, we explicitly compute the virtual contributions for the space-like one-jet processes, ∅ → g★gg, ∅ → g★qq¯, ∅ → g★gH and ∅ → g★q¯qe+e− within the auxiliary parton method. Our results, which are expected to play an important role in high precision description of small x physics, explicitly confirm the conjecture developed in Ref. [1], thus helping to bridge the gap between lowest order calculations and NLO corrections within hybrid kT -factorization scheme. © 2022, CC BY.

关键词：

Efficient transmutation of long-lived fission products in a Gamma Factory beam driven advanced nuclear energy system

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arXiv 2024年

作者： Hu, Baolong Krasny, Mieczyslaw Witold Placzek, Wieslaw Yuan, Yun Shi, Xiaoming Luo, Kaijun Luo, Wen School of Nuclear Science and Technology University of South China Hengyang421001 China Key Laboratory of Advanced Nuclear Energy Design and Safety Ministry of Education Hengyang421001 China LPNHE University Paris Sorbonne Paris75005 France CERN Geneva1211 Switzerland Faculty of Physics Astronomy and Applied Computer Science Mark Kac Center for Complex Systems Research Jagiellonian University ul. Lojasiewicza 11 Krakow30–348 Poland

The Gamma Factory (GF) project aims to generate high-intensity γ-ray beams of tunable energy and relatively small energy spread. Such beams can be optimized to generate an intense photo-neutron source, capable of driving an advanced nuclear energy system (ANES) for nuclear waste transmutation and supplying electrical power that is necessary for the GF operation mode of the Large Hadron Collider storage ring. In this study, we investigate the feasibility of driving ANES with the GF beam which is optimized to maximize the neutron production rate. The dependence of the ANES thermal power on the distance between the positions of the ANES and the GF γ-ray source is evaluated. For the γ-ray beam reaching the intensity of ∼1019 photons per second, the ANES thermal power could exceed 500 MWt. Under the assumption that ANES operates over 20 years, the transmutation rate could reach 30% for five typical long-lived fission products (LLFPs): 79Se, 99Tc, 107Pd, 129I, 137Cs. Our comparative studies show that although the neutron production efficiency of the GF γray beam (per MW of the beam power) is approximately 14 times lower than that of the 500 MeV proton beam, the overall net ANES power production efficiency for the GF beam driver scheme could be comparable to that of the proton beam driver scheme, while providing additional transmutation capacity, not available for the proton beam driven scheme. It is suggested that the GF-based ANES could provide a viable solution for the efficient transmutation of LLFPs without isotopic separation. Copyright © 2024, The Authors. All rights reserved.

关键词： Storage rings