Prohlížení Acta Polytechnica. 2013, vol. 53, Supplement dle názvu

Zobrazují se záznamy 1-20 z 68

    • A COMPUTER CLUSTER SYSTEM FOR PSEUDO-PARALLEL EXECUTION OF GEANT4 SERIAL APPLICATION 

      Autor: Federici, Memmo; Martino, Bruno L.
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2013)
      Simulation of the interactions between particles and matter in studies for developing X-rays detectors generally requires very long calculation times (up to several days or weeks). These times are often a serious limitation ...

    • ACCRETION DISKS WITH A LARGE SCALE MAGNETIC FIELD AROUND BLACK HOLES 

      Autor: Bisnovatyi-Kogan, Gennady; Klepnev, Alexandr S.; Lovelace, Richard V.E.
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2013)
      We consider accretion disks around black holes at high luminosity, and the problem of the formation of a large-scale magnetic field in such disks, taking into account the non-uniform vertical structure of the disk. The ...

    • AGILE DATA CENTER AT ASDC AND AGILE HIGHLIGHTS 

      Autor: Pittori, Carlotta
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2013)
      We present an overview of the main AGILE Data Center activities and the AGILE scientific highlights during the first 5 years of operations. AGILE is an ASI space mission in joint collaboration with INAF, INFN and CIFS, ...

    • ANALYSIS OF THE MACRO EXPERIMENT DATA TO COMPARE PARTICLE ARRIVAL TIMES UNDER GRAN SASSO 

      Autor: Ronga, Francesco
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2013)
      The claim of a neutrino velocity different from the speed of the light, made in September 2011 by the Opera experiment, suggested the study of the time delays between TeV underground muons in the Gran Sasso laboratory using ...

    • ARGO-YBJ: STATUS AND HIGHLIGHTS 

      Autor: Di Sciascio, Giuseppe
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2013)
      The ARGO-YBJ experiment has been gathering data steadily since November 2007 at the YangBaJing Cosmic Ray Laboratory (Tibet, P.R. China, 4300m a.s.l., 606 g/cm2). ARGO-YBJ is confronting various open problems in Cosmic Ray ...

    • ASTRONOMICAL PLATE ARCHIVES AND SUPERMASSIVE BLACK HOLE BINARIES 

      Autor: Hudec, René
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2013)
      The recent extensive digitisation of astronomical photographic plate archives, the development of new dedicated software and the use of powerful computers have for the first time enabled effective data mining in extensive ...

    • COMPUTATIONAL SCHEMES FOR THE PROPAGATION OF ULTRA HIGH ENERGY COSMIC RAYS 

      Autor: Aloisio, Roberto
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2013)
      We discuss the problem of ultra high energy particles propagation in astrophysical backgrounds. We present two different computational schemes based on kinetic and Monte Carlo approaches. The kinetic approach is an analytical ...

    • CONSTRAINING SPACETIME TORSION WITH THE MOON, MERCURY AND LAGEOS 

      Autor: March, Riccardo; Bellettini, Giovanni; Tauraso, Roberto; Dell’Agnello, Simone
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2013)
      We consider an extension of Einstein General Relativity where, beside the Riemann curvature tensor, we suppose the presence of a torsion tensor. Using a parametrized theory based on symmetry arguments, we report on some ...

    • CP VIOLATIONS (AND MORE) AFTER THE FIRST TWO YEARS OF LHCB 

      Autor: Auriemma, Giulio
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2013)
      The most interesting cosmological open problems, baryon asymmetry, dark matter, inflation and dark energy, are not explained by the standard model of particle physics (SM). The finalgoal of the Large Hadron Collider an ...

    • DAMA RESULTS: DARK MATTER IN THE GALACTIC HALO 

      Autor: Bernabei, R.; Belli, P.; Cappella, F.; Caracciolo, V.; Cerulli, R.; Dai, C. J.; d’Angelo, A.; Di Marco, A.; He, H. L.; Incicchitti, A.; Ma, X. H.; Montecchia, F.; Sheng, X. D.; Wang, R. G.; Ye, Z. P.
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2013)
      Experimental efforts and theoretical developmens support that most of the Universe is Dark and a large fraction of it should be made of relic particles; many possibilities are open on their nature and interaction types. ...

    • DARK ENERGY AND KEY PHYSICAL PARAMETERS OF CLUSTERS OF GALAXIES 

      Autor: Bisnovatyi-Kogan, Gennady S.; Chernin, Artur; Merafina, Marco
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2013)
      We study physics of clusters of galaxies embedded in the cosmic dark energy background. The equilibrium and stability of polytropic spheres with equation of state of the matter             P = Kpγ, γ = 1 + 1/n, in presence ...

    • DETECTION OF A CHANGE OF SLOPE IN THE SPECTRUM OF HEAVY MASS COSMIC RAYS PRIMARIES BY THE KASCADE-GRANDE EXPERIMENT 

      Autor: Chiavassa, A.; Apel, W. D.; Arteaga-Velázquez, J. C.; Bekk, K.; Bertaina, M.; Blümer, J.; Bozdog, H.; Brancus, I. M.; Cantoni, E.; Cossavella, F.; Daumiller, K.; de Souza, V.; Di Pierro, F.; Doll, P.; Engel, R.; Engler, J.; Finger, M.; Fuchs, B.; Fuhrmann, D.; Garino, F.; Gils, H. J.; Glasstetter, R.; Grupen, C.; Haungs, A.; Heck, D.; Hörandel, J. R.; Huber, D.; Huege, T.; Kampert, K.-H.; Kang, D.; Klages, H. O.; Link, K.; Łuczak, P.; Ludwig, M.; Mathes, H. J.; Mayer, H. J.; Melissas, M.; Milke, J.; Mitrica, B.; Morello, C.; Oehlschläger, J.; Ostapchenko, S.; Palmieri, N.; Petcu, M.; Pierog, T.; Rebel, H.; Roth, M.; Schieler, H.; Schoo, S.; Schröder, F. G.; Sima, O.; Toma, G.; Trinchero, G. C.; Ulrich, H.; Weindl, A.; Wochele, J.; Wommer, M.; Zabierowski, J.
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2013)
      KASCADE-Grande is an extensive air shower experiment devoted to the study of cosmic rays in the 1016 ÷ 1018 eV energy range. The array is composed by different detectors allowing independent measurements of the number of ...

    • DISC ATMOSPHERES AND WINDS IN X-RAY BINARIES 

      Autor: Díaz Trigo, Maria; Boirin, Laurence
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2013)
      We review the current status of studies of disc atmospheres and winds in low mass X-ray binaries. We discuss the possible wind launching mechanisms and compare the predictions of the models with the existent observations. ...

    • DO WE SEE THE ‘IRON PEAK’? 

      Autor: Erlykin, Anatoly D.; Wolfendale, Arnold W.
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2013)
      Recent measurements of the cosmic ray (CR) energy spectrum in the PeV region and above have confirmed the remarkable sharpness of the knee and revealed another structure at about 70PeV which we call the ‘Iron Peak’. The ...

    • EROSITA: AGN SCIENCE, BACKGROUND DETERMINATION, AND OPTICAL FOLLOW-UP SPECTROSCOPY 

      Autor: Boller, Thomas
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2013)
      More than 20 years after the highly impacting ROSAT all-sky survey in the soft X-ray spectral range, we are close to the next major X-ray all/sky surveys with eROSITA. eROSITA will be the primary instrument on-board the ...

    • FROM GALACTIC TO EXTRAGALACTIC JETS: A REVIEW 

      Autor: Beall, James H.
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2013)
      An analysis of the data that have recently become available from observing campaigns, including VLA, VLBA, and satellite instruments, shows some remarkable similarities and significant differences in the data from some ...

    • GALACTIC AND EXTRAGALACTIC SUPERNOVA REMNANTS AS SITES OF PARTICLE ACCELERATION 

      Autor: Sasaki, Manami
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2013)
      Supernova remnants, owing to their strong shock waves, are likely sources of Galactic cosmic rays. Studies of supernova remnants in X-rays and gamma rays provide us with new insights into the acceleration of particles to ...

    • GRB INVESTIGATIONS BY ESA GAIA AND LOFT 

      Autor: Hudec, René; Šimon, Vojtech; Hudec, Lukáš
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2013)
      The possibility of studying GRBs with the ESA Gaia and LOFT missions is briefly addressed. The ESA Gaia satellite to be launched in November 2013 will focus on high precision astrometry of stars and all objects down to ...

    • HIGHLIGHTS FROM THE LHC 

      Autor: Straessner, Arno
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2013)
      The Large Hadron Collider (LHC) and the two multi-purpose detectors, ATLAS and CMS, have been operated successfully at record centre-of-mass energies of 7 ÷ 8TeV. This paper presents the main physics results from proton–proton ...

    • ICECUBE OBSERVATORY: NEUTRINOS AND THE ORIGIN OF COSMIC RAYS 

      Autor: Desiati, Paolo
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2013)
      The completed IceCube Observatory, the first km3 neutrino telescope, is already providing the most stringent limits on the flux of high energy cosmic neutrinos from point-like and diffuse galactic and extra-galactic sources. ...