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17th International Multidisciplinary Scientific Geoconference, SGEM 2017

作者： Fheed, Adam Krzyżak, Artur Lalowicz, Zdzislaw AGH University of Science and Technology Faculty of Geology Geophysics and Environmental Protection Department of Fossil Fuels Kraków Poland The Henryk Niewodniczański Institute of Nuclear Physics Polish Academy of Sciences Kraków Poland

ISBN: (纸本)9786197408263

Both complicated dissolution processes and different patterns of fossils’ distribution may be expected in carbonate hydrocarbon reservoirs. Therefore, this paper aims to precisely locate such places using few independent analytical tools. Five carbonate samples from the Permian Brońsko Reef (Western Poland) were studied in a form of both thin sections and cylindrical core samples. The latter were subjected to Computed Microtomography (μCT) and Nuclear Magnetic Resonance (NMR) experiments. While the μCT helped to preliminarily localize the most valid pores, the NMR provided significant information on petrophysical attractiveness of the reservoir. NMR research consisted of: (1) 9.4 [T], high-field, Zero Echo Time (ZTE) imaging;and (2) 0.05 [T], low-field, spatially resolved T2 profiling. As illustrated by the obtained results, joining together both low-field and high-field data, seems to be very desirable. The low-field approach showed the general trends in pore-size distribution, whereas the ZTE imaging allowed for the most permeable zones to be caught. Hence, numerous mouldic, cavernous and intraparticle porosity networks could have been located and investigated. Moreover, one more advantage of combining low- and high-field data should be considered. Although the high-field experiments may, in fact, yield better signal to noise ratio (SNR), they tend to show a relatively high vulnerability to generate the internal magnetic field gradients. The gradients may be present particularly when there is a significant difference between the magnetic susceptibility of the fossils and pore fluids, respectively. A much weaker magnetic field, utilized in the low-field NMR, enables omitting such signal disruptions, but this happens at the expense of method’s resolution. The exactness of such measurements can be additionally ameliorated by applying the spatially-resolved T2 experiments. Chosen slices of the same sample are then polarized separately and improve the accuracy of any e

关键词： Nuclear magnetic resonance

A first principle study of the electronic structures of transition metal doped gan for diluted magnetic semiconductor applications

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A first principle study of the electronic structures of tran...

2016 Engineering physics International Conference, EPIC 2016

作者： Romanudhin Prabowo, Wahyu Aji Eko Fathurrahman, Fadjar Melati, Asih Dipojono, Hermawan Kresno Department of Physics Faculty of Science and Technology Sunan Kalijaga State Islamic University Jl. Marsda Adisucipto Yogyakarta55281 Indonesia Department of Engineering Physics Faculty of Industrial Technology Bandung Institute of Technology Jl. Ganesa No. 10 Bandung40132 Indonesia Department of Computer Science Faculty of Computer Science Dian Nuswantoro University Jl. Imam Bonjol No. 207 Semarang50131 Indonesia Research Center for Nanosciences and Nanotechnology Bandung Institute of Technology Jl. Ganesa No. 10 Bandung40132 Indonesia

Gallium nitride (GaN) is a well-known non-magnetic semiconductor material. However it can be transformed into magnetic material, i.e. diluted magnetic semiconductor (DMS), by adding magnetic materials as impurities. Since transition metal elements have magnetic properties, hence can be used as impurity elements for forming DMS. This paper reports our investigation of the electronic structure of GaN doped with transition metal elements (Sc, Ti, V, Cr, Mn, Fe, Co, Ni, Cu and Zn) by using density functional theory (DFT). Based on the results, GaN-Sc;GaN-Zn and GaN-Cu have no magnetic characteristic. GaN-Ti;GaN-V;GaN-Fe, GaN-Cr;GaN-Co;GaN-Ni;GaN-Fe have a magnetic characteristic. GaN-Co and GaN-Fe are the candidate to apply to DMS, because they have magnetic and semiconductor properties. These two properties are the main character of DMS. © 2017 The Authors.

关键词： Density functional theory

Search for an exotic S=-2, Q=-2 baryon resonance in proton-proton interactions at √sNN = 17.3 GeV

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arXiv 2019年

作者： Aduszkiewicz, A. Andronov, E.V. Antićić, T. Babkin, V. Baszczyk, M. Bhosale, S. Blondel, A. Bogomilov, M. Brandin, A. Bravar, A. Bryliński, W. Brzychczyk, J. Buryakov, M. Busygina, O. Bzdak, A. Cherif, H. Ćirković, M. Csanad, M. Cybowska, J. Czopowicz, T. Damyanova, A. Davis, N. Deliyergiyev, M. Deveaux, M. Dmitriev, A. Dominik, W. Dorosz, P. Dumarchez, J. Engel, R. Feofilov, G.A. Fields, L. Fodor, Z. Garibov, A. Gaździcki, M. Golosov, O. Golovatyuk, V. Golubeva, M. Grebieszkow, K. Guber, F. Haesler, A. Igolkin, S.N. Ilieva, S. Ivashkin, A. Johnson, S.R. Kadija, K. Kargin, N. Kashirin, E. Kielbowicz, M. Kireyeu, V.A. Klochkov, V. Kolesnikov, V.I. Kolev, D. Korzenev, A. Kovalenko, V.N. Kowalski, S. Koziel, M. Krasnoperov, A. Kucewicz, W. Kuich, M. Kurepin, A. Larsen, D. László, A. Lazareva, T.V. Lewicki, M. Lojek, K. Lysakowski, B. Lyubushkin, V.V. Maćkowiak-Pawlowska, M. Majka, Z. Maksiak, B. Malakhov, A.I. Marcinek, A. Marino, A.D. Marton, K. Mathes, H.-J. Matulewicz, T. Matveev, V. Melkumov, G.L. Merzlaya, A.O. Messerly, B. Mik, L. Morozov, S. Mrówczynski, S. Nagai, Y. Naskret, M. Ozvenchuk, V. Paolone, V. Petukhov, O. Planeta, R. Podlaski, P. Popov, B.A. Porfy, B. Posiadala-Zezula, M. Prokhorova, D.S. Pszczel, D. Pulawski, S. Puzović, J. Ravonel, M. Renfordt, R. Röhrich, D. Rondio, E. Roth, M. Rumberger, B.T. Rumyantsev, M. Rustamov, A. Rybczynski, M. Rybicki, A. Sadovsky, A. Schmidt, K. Selyuzhenkov, I. Seryakov, A.Yu. Seyboth, P. Slodkowski, M. Staszel, P. Stefanek, G. Stepaniak, J. Strikhanov, M. Ströbele, H. Šuša, T. Taranenko, A. Tefelska, A. Tefelski, D. Tereshchenko, V. Toia, A. Tsenov, R. Turko, L. Ulrich, R. Unger, M. Valiev, F.F. Veberič, D. Vechernin, V.V. Wickremasinghe, A. Wlodarczyk, Z. Wyszynski, O. Zimmerman, E.D. Zwaska, R. National Nuclear Research Center Baku Azerbaijan Faculty of Physics University of Sofia Sofia Bulgaria Ruder ¯ Bošković Institute Zagreb Croatia LPNHE University of Paris VI and VII Paris France Karlsruhe Institute of Technology Karlsruhe Germany University of Frankfurt Frankfurt Germany Wigner Research Centre for Physics of the Hungarian Academy of Sciences Budapest Hungary University of Bergen Bergen Norway Jan Kochanowski University in 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 Institute for Nuclear Research Moscow Russia Joint Institute for Nuclear Research Dubna Russia Moscow Russia St. Petersburg State University St. Petersburg Russia University of Belgrade Belgrade Serbia University of Geneva Geneva Switzerland Fermilab Batavia United States University of Colorado Boulder United States University of Pittsburgh Pittsburgh United States

Pentaquark states have been extensively investigated theoretically in the context of the constituent quark model. In this paper results of an experimental search for pentaquarks in the Ξ− π−, Ξ− π+, Ξ+ π− and Ξ+ π+ invariant mass spectra in proton-proton interactions at √s=17.3 GeV are presented. Previous possible evidence from the NA49 collaboration of the existence of a narrow Ξ− π− baryon resonance in p+p interactions is not confirmed with almost 10 times greater event statistics. The search was performed using the NA61/SHINE detector which reuses the main components of the NA49 apparatus. No signal was observed with either the selection cuts of NA49 or newly optimised cuts. Copyright © 2019, The Authors. All rights reserved.

关键词： Germanium alloys

Search for secluded dark matter towards the Galactic Centre with the ANTARES neutrino telescope

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arXiv 2022年

作者： Albert, A. Alves, S. André, M. Anghinolfi, M. Anton, G. Ardid, M. Ardid, S. Aubert, J.-J. Aublin, J. Baret, B. Basa, S. Belhorma, B. Bendahman, M. Benfenati, F. Bertin, V. Biagi, S. Bissinger, M. Boumaaza, J. Bouta, M. Bouwhuis, M.C. Brânzaş, H. Bruijn, R. Brunner, J. Busto, J. Caiffi, B. Calvo, D. Capone, A. Caramete, L. Carr, J. Carretero, V. Celli, S. Chabab, M. Chau, T.N. Cherkaoui El Moursli, R. Chiarusi, T. Circella, M. Coleiro, A. Coniglione, R. Coyle, P. Creusot, A. Díaz, A.F. de Wasseige, G. Distefano, C. Di Palma, I. Domi, A. Donzaud, C. Dornic, D. Drouhin, D. Eberl, T. van Eeden, T. van Eijk, D. El Khayati, N. Enzenhöfer, A. Fermani, P. Ferrara, G. Filippini, F. Fusco, L. Gatelet, Y. Gay, P. Glotin, H. Gozzini, R. Gracia Ruiz, R. Graf, K. Guidi, C. Hallmann, S. van Haren, H. Heijboer, A.J. Hello, Y. Hernández-Rey, J.J. Hößl, J. Hofestädt, J. Huang, F. Illuminati, G. James, C.W. Jisse-Jung, B. de Jong, M. de Jong, P. Kadler, M. Kalekin, O. Katz, U. Khan-Chowdhury, N.R. Kouchner, A. Kreykenbohm, I. Kulikovskiy, V. Lagunas Gualda, C. Lahmann, R. Le Breton, R. LeStum, S. Lefèvre, D. Leonora, E. Levi, G. Lincetto, M. Lopez-Coto, D. Loucatos, S. Maderer, L. Manczak, J. Marcelin, M. Margiotta, A. Marinelli, A. Martínez-Mora, J.A. Martino, B. Melis, K. Migliozzi, P. Moussa, A. Muller, R. Nauta, L. Navas, S. Nezri, E. Fearraigh, B.Ó. Paun, A. Pavalaş, G.E. Pellegrino, C. Perrin-Terrin, M. Pestel, V. Piattelli, P. Pieterse, C. Poirè, C. Popa, V. Pradier, T. Randazzo, N. Real, D. Reck, S. Riccobene, G. Romanov, A. Sala, F. Sánchez-Losa, A. Salesa Greus, F. Samtleben, D.F.E. Sanguineti, M. Sapienza, P. Schnabel, J. Schumann, J. Schüssler, F. Seneca, J. Spurio, M. Stolarczyk, Th. Taiuti, M. Tayalati, Y. Tingay, S.J. Vallage, B. Van Elewyck, V. Versari, F. Viola, S. Vivolo, D. Wilms, J. Zavatarelli, S. Zegarelli, A. Zornoza, J.D. Zúñiga, J. Université de Strasbourg CNRS IPHC UMR 7178 StrasbourgF-67000 France Université de Haute Alsace MulhouseF-68100 France c/ Catedrático José Beltrán Paterna Valencia2 E-46980 Spain Technical University of Catalonia Laboratory of Applied Bioacoustics Rambla Exposició Vilanova i la Geltrú Barcelona08800 Spain INFN - Sezione di Genova Via Dodecaneso 33 Genova16146 Italy Friedrich-Alexander-Universität Erlangen-Nürnberg Erlangen Centre for Astroparticle Physics Erwin-Rommel-Str. 1 Erlangen91058 Germany Universitat Politècnica de València C/ Paranimf 1 Gandia46730 Spain Aix Marseille Univ CNRS IN2P3 CPPM Marseille France Université de Paris CNRS Astroparticule et Cosmologie ParisF-75013 France Aix Marseille Univ CNRS CNES LAM Marseille France National Center for Energy Sciences and Nuclear Techniques B.P.1382 R. P.10001 12 Morocco University Mohammed V in Rabat Faculty of Sciences 4 av. Ibn Battouta B.P. 1014 RabatR.P. 10000 Morocco INFN - Sezione di Bologna Viale Berti-Pichat 6/2 Bologna40127 Italy Dipartimento di Fisica e Astronomia dell’Università Viale Berti Pichat 6/2 Bologna40127 Italy Via S. Sofia 62 Catania95123 Italy Laboratory of Physics of Matter and Radiations B.P.717 Oujda6000 Morocco Nikhef Science Park Amsterdam Netherlands Institute of Space Science Bucharest MagureleRO-077125 Romania Universiteit van Amsterdam Instituut voor Hoge-Energie Fysica Science Park 105 Amsterdam1098 XG Netherlands INFN - Sezione di Roma P.le Aldo Moro 2 Roma00185 Italy Dipartimento di Fisica dell’Università La Sapienza P.le Aldo Moro 2 Roma00185 Italy LPHEA Faculty of Science - Semlali Cadi Ayyad University MarrakechP.O.B. 2390 Morocco INFN - Sezione di Bari Via E. Orabona 4 Bari70126 Italy Department of Computer Architecture and Technology CITIC University of Granada Granada18071 Spain Université Paris-Sud Orsay Cedex91405 France Laboratoire de Physique Corpusculaire Clermont Université Université Blaise Pascal

Searches for dark matter (DM) have not provided any solid evidence for the existence of weakly interacting massive particles in the GeV-TeV mass range. Coincidentally, the scale of new physics is being pushed by collider searches well beyond the TeV domain. This situation strongly motivates the exploration of DM masses much larger than a TeV. Secluded scenarios contain a natural way around the unitarity bound on the DM mass, via the early matter domination induced by the mediator of its interactions with the Standard Model. High-energy neutrinos constitute one of the very few direct accesses to energy scales above a few TeV. An indirect search for secluded DM signals has been performed with the ANTARES neutrino telescope using data from 2007 to 2015. Upper limits on the DM annihilation cross section for DM masses up to 6 PeV are presented and discussed. © 2022, CC0.

关键词： Galaxies

Strong-Field Gravity Tests with the Double Pulsar

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Physical Review X 2021年第4期11卷 041050-041050页

作者： M. Kramer I. H. Stairs R. N. Manchester N. Wex A. T. Deller W. A. Coles M. Ali M. Burgay F. Camilo I. Cognard T. Damour G. Desvignes R. D. Ferdman P. C. C. Freire S. Grondin L. Guillemot G. B. Hobbs G. Janssen R. Karuppusamy D. R. Lorimer A. G. Lyne J. W. McKee M. McLaughlin L. E. Münch B. B. P. Perera N. Pol A. Possenti J. Sarkissian B. W. Stappers G. Theureau Max-Planck-Institut für Radioastronomie Auf dem Hügel 69 D-53121 Bonn Germany Jodrell Bank Centre for Astrophysics The University of Manchester Oxford M13 9PL United Kingdom Department of Physics and Astronomy University of British Columbia 6224 Agricultural Road Vancouver British Columbia V6T 1Z1 Canada Australia Telescope National Facility CSIRO Space and Astronomy P.O. Box 76 Epping New South Wales 1710 Australia Centre for Astrophysics and Supercomputing Swinburne University of Technology P.O. Box 218 Hawthorn Victoria 3122 Australia ARC Centre of Excellence for Gravitational Wave Discovery (OzGrav) P.O. Box 218 Hawthorn Victoria 3122 Australia Electrical and Computer Engineering University of California at San Diego La Jolla California 92093 USA Perimeter Institute for Theoretical Physics 31 Caroline Street North Waterloo Ontario Canada N2L 2Y5 INAF-Osservatorio Astronomico di Cagliari Via della Scienza 5 09047 Selargius (CA) Italy South African Radio Astronomy Observatory 2 Fir Street Black River Park Observatory 7925 South Africa Laboratoire de Physique et Chimie de l’Environnement et de l’Espace LPC2E CNRS-Université d’Orléans F-45071 Orléans France Station de Radioastronomie de Nançay Observatoire de Paris CNRS/INSU F-18330 Nançay France Institut des Hautes Études Scientifiques 91440 Bures-sur-Yvette France LESIA Observatoire de Paris Universit PSL CNRS Sorbonne Université Universit de Paris 5 Place Jules Janssen 92195 Meudon France Faculty of Science University of East Anglia Norwich NR4 7TJ United Kingdom David A. Dunlap Department of Astronomy and Astrophysics University of Toronto 50 St. George Street Toronto Ontario M5S 3H4 Canada ASTRON Netherlands Institute for Radio Astronomy Oude Hoogeveensedijk 4 7991 PD Dwingeloo Netherlands Department of Astrophysics/IMAPP Radboud University P.O. Box 9010 6500 GL Nijmegen Netherlands Department of Physics and Astronomy West Virginia University P.O. Box 6315 Morgantown West Virginia

Continued timing observations of the double pulsar PSR J0737–3039A/B, which consists of two active radio pulsars (A and B) that orbit each other with a period of 2.45 h in a mildly eccentric (e=0.088) binary system, have led to large improvements in the measurement of relativistic effects in this system. With a 16-yr data span, the results enable precision tests of theories of gravity for strongly self-gravitating bodies and also reveal new relativistic effects that have been expected but are now observed for the first time. These include effects of light propagation in strong gravitational fields which are currently not testable by any other method. In particular, we observe the effects of retardation and aberrational light bending that allow determination of the spin direction of the pulsar. In total, we detect seven post-Keplerian parameters in this system, more than for any other known binary pulsar. For some of these effects, the measurement precision is now so high that for the first time we have to take higher-order contributions into account. These include the contribution of the A pulsar’s effective mass loss (due to spin-down) to the observed orbital period decay, a relativistic deformation of the orbit, and the effects of the equation of state of superdense matter on the observed post-Keplerian parameters via relativistic spin-orbit coupling. We discuss the implications of our findings, including those for the moment of inertia of neutron stars, and present the currently most precise test of general relativity’s quadrupolar description of gravitational waves, validating the prediction of general relativity at a level of 1.3×10−4 with 95% confidence. We demonstrate the utility of the double pulsar for tests of alternative theories of gravity by focusing on two specific examples and also discuss some implications of the observations for studies of the interstellar medium and models for the formation of the double pulsar system. Finally, we provide context t

关键词： Alternative gravity theories Electromagnetic radiation astronomy Experimental studies of gravity General relativity Gravitation Gravitational wave detection Gravitational wave sources Gravitational waves Radio, microwave, & sub-mm astronomy Binary stars Interstellar medium Neutron stars & pulsars

Model of knowledge transfer within an organisation

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arXiv 2017年

作者： Kowalska-Styczeń, Agnieszka Malarz, Krzysztof Paradowski, Kamil Silesian University of Technology Faculty of Organisation and Management ul. Roosevelta 26/28 Zabrze41-800 Poland AGH University of Science and Technology Faculty of Physics and Applied Computer Science al. Mickiewicza 30 Krakow30-059 Poland

Many studies show that the acquisition of knowledge is the key to build competitive advantage of companies. We propose a simple model of knowledge transfer within the organization and we implement the proposed model using cellular automata technique. In this paper the organisation is considered in the context of complex systems. In this perspective, the main role in organisation is played by the network of informal contacts and the distributed leadership. The goal of this paper is to check which factors influence the efficiency and effectiveness of knowledge transfer. Our studies indicate a significant role of initial concentration of chunks of knowledge for knowledge transfer process, and the results suggest taking action in the organisation to shorten the distance (social distance) between people with different levels of knowledge, or working out incentives to share knowledge. Copyright © 2017, The Authors. All rights reserved.

关键词： Knowledge management

First observation of the cosmic ray shadow of the Moon and the Sun with KM3NeT/ORCA

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arXiv 2022年

作者： Aiello, S. Albert, A. Alves Garre, S. Aly, Z. Ambrosone, A. Ameli, F. Andre, M. Anghinolfi, M. Anguita, M. Ardid, M. Ardid, S. Aublin, J. Bagatelas, C. Bailly-Salins, L. Baret, B. Basegmez du Pree, S. Becherini, Y. Bendahman, M. Benfenati, F. Berbee, E. Bertin, V. Biagi, S. Boettcher, M. Bou Cabo, M. Boumaaza, J. Bouta, M. Bouwhuis, M. Bozza, C. Brânzaş, H. Bruijn, R. Brunner, J. Bruno, R. Buis, E. Buompane, R. Busto, J. Caiffi, B. Calvo, D. Campion, S. Capone, A. Carenini, F. Carretero, V. Castaldi, P. Celli, S. Cerisy, L. Chabab, M. Chau, N. Chen, A. Cherkaoui El Moursli, R. Cherubini, S. Chiarella, V. Chiarusi, T. Circella, M. Cocimano, R. Coelho, J.A.B. Coleiro, A. Coniglione, R. Coyle, P. Creusot, A. Cruz, A. Cuttone, G. Dallier, R. Darras, Y. De Benedittis, A. De Martino, B. Del Burgo, R. Di Palma, I. Dìaz, A.F. Diego-Tortosa, D. Distefano, C. Domi, A. Donzaud, C. Dornic, D. Dörr, M. Drakopoulou, E. Drouhin, D. Eberl, T. Eddyamoui, A. van Eeden, T. Eff, M. van Eijk, D. El Bojaddaini, I. El Hedri, S. Enzenhöfer, A. Espinosa, V. Ferrara, G. Filipović, M.D. Filippini, F. Fusco, L.A. Gabriel, J. Gal, T. García Méndez, J. Garcia Soto, A. Garufi, F. Gatius Oliver, C. Geißelbrecht, N. Gialanella, L. Giorgio, E. Girardi, A. Goos, I. Gozzini, S.R. Gracia, R. Graf, K. Guderian, D. Guidi, C. Guillon, B. Gutiérrez, M. Haegel, L. van Haren, H. Heijboer, A. Hekalo, A. Hennig, L. Hernández-Rey, J.J. Huang, F. Idrissi Ibnsalih, W. Illuminati, G. James, C.W. Janezashvili, D. de Jong, M. de Jong, P. Jung, B.J. Kalaczyński, P. Kalekin, O. Katz, U.F. Khan Chowdhury, N.R. Kistauri, G. van der Knaap, F. Kooijman, P. Kouchner, A. Kulikovskiy, V. Labalme, M. Lahmann, R. Lakhal, A. Lamoureux, M. Larosa, G. Lastoria, C. Lazo, A. Le Breton, R. Le Stum, S. Lehaut, G. Leonora, E. Lessing, N. Levi, G. Liang, S. Lindsey Clark, M. Longhitano, F. Maderer, L. Majumdar, J. Mańczak, J. Margiotta, A. Marinelli, A. Markou, C. Martin, L. INFN Sezione di Catania Via Santa Sofia 64 Catania95123 Italy Université de Strasbourg CNRS IPHC UMR 7178 StrasbourgF-67000 France IFIC - Instituto de Física Corpuscular CSIC - Universitat de València c/Catedrático José Beltrán 2 Valencia Paterna46980 Spain Aix Marseille Univ CNRS/IN2P3 CPPM Marseille France INFN Sezione di Napoli Complesso Universitario di Monte S. Angelo Via Cintia ed. G Napoli80126 Italy Università di Napoli "Federico II" Dip. Scienze Fisiche "E. Pancini" Complesso Universitario di Monte S. Angelo Via Cintia ed. G Napoli80126 Italy INFN Sezione di Roma Piazzale Aldo Moro 2 Roma00185 Italy Universitat Politècnica de Catalunya Laboratori d'Aplicacions Bioacústiques Centre Tecnològic de Vilanova i la Geltrú Avda. Rambla Exposició s/n Vilanova i la Geltrú08800 Spain INFN Sezione di Genova Via Dodecaneso 33 Genova16146 Italy University of Granada Dept. of Computer Architecture and Technology CITIC Granada18071 Spain Universitat Politècnica de València Instituto de Investigación para la Gestión Integrada de las Zonas Costeras C/Paranimf 1 Gandia46730 Spain Université de Paris CNRS Astroparticule et Cosmologie ParisF-75013 France NCSR Demokritos Institute of Nuclear and Particle Physics Ag. Paraskevi Attikis Athens15310 Greece LPC CAEN A02182036 6 boulevard Maréchal Juin Caen14050 France Nikhef National Institute for Subatomic Physics PO Box 41882 Amsterdam1009 DB Netherlands University Mohammed V in Rabat Faculty of Sciences 4 av. Ibn Battouta B.P. 1014 RabatR.P. 10000 Morocco INFN Sezione di Bologna v.le C. Berti-Pichat 6/2 Bologna40127 Italy Università di Bologna Dipartimento di Fisica e Astronomia v.le C. Berti-Pichat 6/2 Bologna40127 Italy INFN Laboratori Nazionali del Sud Via S. Sofia 62 Catania95123 Italy North-West University Centre for Space Research Private Bag X6001 Potchefstroom2520 South Africa Instituto Español de Oceanografía Unidad Mixta IEO-UPV C/Paranimf 1 Gandia46730

This article reports the first observation of the Moon and the Sun shadows in the sky distribution of cosmic-ray induced muons measured by the KM3NeT/ORCA detector. The analysed data-taking period spans from February 2020 to November 2021, when the detector had 6 Detection Units deployed at the bottom of the Mediterranean Sea, each composed of 18 Digital Optical Modules. The shadows induced by the Moon and the Sun were detected at their nominal position with a statistical significance of 4.2σ and 6.2σ, and an angular resolution of σres = 0.49◦ and σres = 0.66◦, respectively, consistent with the prediction of 0.53◦ from simulations. This early result confirms the effectiveness of the detector calibration, in time, position and orientation and the accuracy of the event direction reconstruction. This also demonstrates the performance and the competitiveness of the detector in terms of pointing accuracy and angular resolution. Copyright © 2022, The Authors. All rights reserved.

关键词： Moon

Influence of fast emissions and statistical de-excitation on the isospin transport ratio

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arXiv 2020年

作者： Camaiani, Alberto Piantelli, S. Ono, A. Casini, G. Borderie, B. Bougault, R. Ciampi, C. Dueñas, J.A. Frosin, C. Frankland, J.D. Gruyer, D. LeNeindre, N. Lombardo, I. Mantovani, G. Ottanelli, P. Parlog, M. Pasquali, G. Upadhyaya, S. Valdré, S. Verde, G. Vient, E. Dipartimento di Fisica Università di Firenze Italy INFN Sezione di Firenze Italy Department of Physics Tohoku University Sendai980-8578 Japan Université Paris-Saclay CNRS/IN2P3 IJCLab Orsay91405 France Normandie Université ENSICAEN UNICAEN CNRS/IN2P3 LPC Caen Caen14000 France Depto. de Ingeniería Eléctrica Centro de Estudios Avanzados en Física Matemáticas y Computación Universidad de Huelva Huelva21007 Spain GANIL CEA/DRF-CNRS/IN2P3 Caen14076 France INFN Sezione di Catania Catania95123 Italy INFN Laboratori Nazionali di Legnaro Legnaro35020 Italy Dipartimento di Fisica Università di Padova Padova35131 Italy Universidade de Santiago de Compostela Santiago de Compostela15705 Spain Bucharest MagureleRO-077125 Romania Faculty of Physics Astronomy and Applied Computer Science Jagiellonian University Kracow30-348 Poland

Isospin transport ratio is a powerful method to estimate the neutron-proton (n-p) equilibration in heavy-ion collisions, and extensively used to obtain information on the asy-stiffness of the nuclear Equation of State. In fact such a ratio is expected to bypass any perturbations introducing a linear transformation of the chosen observable. In particular, it is supposed to overcome contributions due to emission, either of dynamical or statistical nature, from the primary fragments formed during the collisions. In this paper we explore the validity of this assumption, looking at the quasi-projectile n-p ratio (N/Z) in peripheral and semi-peripheral events for Ca+Ca reactions at 35 MeV/nucleon, simulated via the Antisymmetrized Molecular Dynamics transport model, coupled to different statistical decay codes. The statistical de-excitation of the primary fragments introduces a linear transformation at relatively high excitation energies (above 2 MeV/nucleon) when the residue approaches the Evaporation Attractor Line, while some effect is produced at lower excitation energies due to the occurrence of some non-linearities. As for fast emissions after the end of the projectile-target interaction it is shown that they introduce a non-linear transformation too. Copyright © 2020, The Authors. All rights reserved.

关键词： Linear transformations

Cognitive Keys in Personalized Cryptography

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Cognitive Keys in Personalized Cryptography

International Conference on Advanced Information Networking and Applications (AINA)

作者： Marek R. Ogiela Lidia Ogiela Faculty of Electrical Engineering Automatics Computer Science and Biomedical Engineering AGH University of Science and Technology Krakow Poland AGH University of Science and Technology Cryptography and Cognitive Informatics Research Group Krakow Poland

ISBN: (纸本)9781509060306

In this paper will be described a new way of using cognitive approaches in personalized cryptography algorithms. Personal information may be used in creation advanced security protocols, as well as personal keys for cryptosystems, and information encoding procedures. Such protocols may play important role in advanced secure management applications. Additionally some behavioral features allow to generate unique sequences, which also may be used in modern cryptographic application. Such possibilities will be described in this paper.

关键词： Cryptography Information systems Feature extraction Semantics Protocols Visualization