检索结果-内蒙古大学图书馆

arXiv 2018年

作者： Abbasi, R.U. Abe, M. Abu-Zayyad, T. Allen, M. Azuma, R. Barcikowski, E. Belz, J.W. Bergman, D.R. Blake, S.A. Cady, R. Cheon, B.G. Chiba, J. Chikawa, M. di Matteo, A. Fujii, T. Fujita, K. Fukushima, M. Furlich, G. Goto, T. Hanlon, W. Hayashi, M. Hayashi, Y. Hayashida, N. Hibino, K. Honda, K. Ikeda, D. Inoue, N. Ishii, T. Ishimori, R. Ito, H. Ivanov, D. Jeong, H.M. Jeong, S. Jui, C.C.H. Kadota, K. Kakimoto, F. Kalashev, O. Kasahara, K. Kawai, H. Kawakami, S. Kawana, S. Kawata, K. Kido, E. Kim, H.B. Kim, J.H. Kim, J.H. Kishigami, S. Kitamura, S. Kitamura, Y. Kuzmin, V. Kuznetsov, M. Kwon, Y.J. Lee, K.H. Lubsandorzhiev, B. Lundquist, J.P. Machida, K. Martens, K. Matsuyama, T. Matthews, J.N. Mayta, R. Minamino, M. Mukai, K. Myers, I. Nagasawa, K. Nagataki, S. Nakamura, R. Nakamura, T. Nonaka, T. Oda, H. Ogio, S. Ogura, J. Ohnishi, M. Ohoka, H. Okuda, T. Omura, Y. Ono, M. Onogi, R. Oshima, A. Ozawa, S. Park, I.H. Piskunov, M.S. Pshirkov, M.S. Remington, J. Rodriguez, D.C. Rubtsov, G. Ryu, D. Sagawa, H. Sahara, R. Saito, K. Saito, Y. Sakaki, N. Sakurai, N. Scott, L.M. Seki, T. Sekino, K. Shah, P.D. Shibata, F. Shibata, T. Shimodaira, H. Shin, B.K. Shin, H.S. Smith, J.D. Sokolsky, P. Stokes, B.T. Stratton, S.R. Stroman, T.A. Suzawa, T. Takagi, Y. Takahashi, Y. Takamura, M. Takeda, M. Takeishi, R. Taketa, A. Takita, M. Tameda, Y. Tanaka, H. Tanaka, K. Tanaka, M. Thomas, S.B. Thomson, G.B. Tinyakov, P. Tkachev, I. Tokuno, H. Tomida, T. Troitsky, S. Tsunesada, Y. Tsutsumi, K. Uchihori, Y. Udo, S. Urban, F. Wong, T. Yamamoto, M. Yamane, R. Yamaoka, H. Yamazaki, K. Yang, J. Yashiro, K. Yoneda, Y. Yoshida, S. Yoshii, H. Zhezher, Y. Zundel, Z. High Energy Astrophysics Institute Department of Physics and Astronomy University of Utah Salt Lake CityUT United States Graduate School of Science and Engineering Saitama University SaitamaSaitama Japan Graduate School of Science and Engineering Tokyo Institute of Technology MeguroTokyo Japan Department of Physics Research Institute of Natural Science Hanyang University Seongdong-gu Seoul Czech Republic Department of Physics Tokyo University of Science NodaChiba Japan Department of Physics Kindai University Higashi OsakaOsaka Japan Service de Physique Thorique Universit Libre de Bruxelles Brussels Belgium Institute for Cosmic Ray Research University of Tokyo KashiwaChiba Japan Graduate School of Science Osaka City University OsakaOsaka Japan Todai Institutes for Advanced Study University of Tokyo KashiwaChiba Japan Information Engineering Graduate School of Science and Technology Shinshu University NaganoNagano Japan Faculty of Engineering Kanagawa University YokohamaKanagawa Japan Interdisciplinary Graduate School of Medicine and Engineering University of Yamanashi KofuYamanashi Japan Astrophysical Big Bang Laboratory RIKEN WakoSaitama Japan Department of Physics Sungkyunkwan University Jang-an-gu Suwon Czech Republic Department of Physics Tokyo City University Setagaya-kuTokyo Japan Institute for Nuclear Research of the Russian Academy of Sciences Moscow Russia Advanced Research Institute for Science and Engineering Waseda University Shinjuku-kuTokyo Japan Department of Physics Chiba University ChibaChiba Japan Department of Physics School of Natural Sciences Ulsan National Institute of Science and Technology UNIST-gil Ulsan Czech Republic Department of Physics Yonsei University Seodaemun-gu Seoul Czech Republic Academic Assembly School of Science and Technology Institute of Engineering Shinshu University NaganoNagano Japan Faculty of Science Kochi University KochiKochi Japan Department of Physical Sciences Ritsumei

The results on ultra-high-energy cosmic rays (UHECR) mass composition obtained with the Telescope Array surface detector are presented. The analysis employs the boosted decision tree (BDT) multivariate analysis built upon 14 observables related to both the properties of the shower front and the lateral distribution function. The multivariate classifier is trained with Monte-Carlo sets of events induced by the primary protons and iron. An average atomic mass of UHECR is presented for energies 1018.0 − 1020.0 eV. The average atomic mass of primary particles shows no significant energy dependence and corresponds to hln Ai = 2.0 ± 0.1(stat.) ± 0.44(syst.). The result is compared to the mass composition obtained by the Telescope Array with Xmax technique along with the results of other experiments. Possible systematic errors of the method are discussed. Copyright © 2018, The Authors. All rights reserved.

关键词： Distribution functions

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Testing a reported correlation between arrival directions of ultrahigh-energy cosmic rays and a flux pattern from nearby starburst galaxies using Telescope Array data

arXiv

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arXiv 2018年

作者： Abbasi, R.U. Abe, M. Abu-Zayyad, T. Allen, M. Azuma, R. Barcikowski, E. Belz, J.W. Bergman, D.R. Blake, S.A. Cady, R. Cheon, B.G. Chiba, J. Chikawa, M. di Matteo, A. Fujii, T. Fujita, K. Fukushima, M. Furlich, G. Goto, T. Hanlon, W. Hayashi, M. Hayashi, Y. Hayashida, N. Hibino, K. Honda, K. Ikeda, D. Inoue, N. Ishii, T. Ishimori, R. Ito, H. Ivanov, D. Jeong, H.M. Jeong, S. Jui, C.C.H. Kadota, K. Kakimoto, F. Kalashev, O. Kasahara, K. Kawai, H. Kawakami, S. Kawana, S. Kawata, K. Kido, E. Kim, H.B. Kim, J.H. Kim, J.H. Kishigami, S. Kitamura, S. Kitamura, Y. Kuzmin, V. Kuznetsov, M. Kwon, Y.J. Lee, K.H. Lubsandorzhiev, B. Lundquist, J.P. Machida, K. Martens, K. Matsuyama, T. Matthews, J.N. Mayta, R. Minamino, M. Mukai, K. Myers, I. Nagasawa, K. Nagataki, S. Nakamura, R. Nakamura, T. Nonaka, T. Oda, H. Ogio, S. Ogura, J. Ohnishi, M. Ohoka, H. Okuda, T. Omura, Y. Ono, M. Onogi, R. Oshima, A. Ozawa, S. Park, I.H. Pshirkov, M.S. Remington, J. Rodriguez, D.C. Rubtsov, G. Ryu, D. Sagawa, H. Sahara, R. Saito, K. Saito, Y. Sakaki, N. Sakurai, N. Scott, L.M. Seki, T. Sekino, K. Shah, P.D. Shibata, F. Shibata, T. Shimodaira, H. Shin, B.K. Shin, H.S. Smith, J.D. Sokolsky, P. Stokes, B.T. Stratton, S.R. Stroman, T.A. Suzawa, T. Takagi, Y. Takahashi, Y. Takamura, M. Takeda, M. Takeishi, R. Taketa, A. Takita, M. Tameda, Y. Tanaka, H. Tanaka, K. Tanaka, M. Thomas, S.B. Thomson, G.B. Tinyakov, P. Tkachev, I. Tokuno, H. Tomida, T. Troitsky, S. Tsunesada, Y. Tsutsumi, K. Uchihori, Y. Udo, S. Urban, F. Wong, T. Yamamoto, M. Yamane, R. Yamaoka, H. Yamazaki, K. Yang, J. Yashiro, K. Yoneda, Y. Yoshida, S. Yoshii, H. Zhezher, Y. Zundel, Z. High Energy Astrophysics Institute Department of Physics and Astronomy University of Utah Salt Lake CityUT United States Graduate School of Science and Engineering Saitama University SaitamaSaitama Japan Graduate School of Science and Engineering Tokyo Institute of Technology MeguroTokyo Japan Department of Physics Research Institute of Natural Science Hanyang University Seongdong-gu Seoul Czech Republic Department of Physics Tokyo University of Science NodaChiba Japan Department of Physics Kindai University Higashi OsakaOsaka Japan Service de Physique Thorique Universit Libre de Bruxelles Brussels Belgium Institute for Cosmic Ray Research University of Tokyo KashiwaChiba Japan Graduate School of Science Osaka City University OsakaOsaka Japan Todai Institutes for Advanced Study University of Tokyo KashiwaChiba Japan Information Engineering Graduate School of Science and Technology Shinshu University NaganoNagano Japan Faculty of Engineering Kanagawa University YokohamaKanagawa Japan Interdisciplinary Graduate School of Medicine and Engineering University of Yamanashi KofuYamanashi Japan Astrophysical Big Bang Laboratory RIKEN WakoSaitama Japan Department of Physics Sungkyunkwan University Jang-an-gu Suwon Czech Republic Department of Physics Tokyo City University Setagaya-kuTokyo Japan Institute for Nuclear Research of the Russian Academy of Sciences Moscow Russia Advanced Research Institute for Science and Engineering Waseda University Shinjuku-kuTokyo Japan Department of Physics Chiba University ChibaChiba Japan Department of Physics School of Natural Sciences Ulsan National Institute of Science and Technology UNIST-gil Ulsan Czech Republic Department of Physics Yonsei University Seodaemun-gu Seoul Czech Republic Academic Assembly School of Science and Technology Institute of Engineering Shinshu University NaganoNagano Japan Faculty of Science Kochi University KochiKochi Japan Department of Physical Sciences Ritsumei

The Pierre Auger Collaboration (Auger) recently reported a correlation between the arrival directions of cosmic rays with energies above 39 EeV and the flux pattern of 23 nearby starburst galaxies (SBGs). In this Letter, we tested the same hypothesis using cosmic rays detected by the Telescope Array experiment (TA) in the 9-year period from May 2008 to May 2017. Unlike the Auger analysis, we did not optimize the parameter values but kept them fixed to the best-fit values found by Auger, namely 9.7% for the anisotropic fraction of cosmic rays assumed to originate from the SBGs in the list and 12.9◦ for the angular scale of the correlations. The energy threshold we adopted is 43 EeV, corresponding to 39 EeV in Auger when taking into account the energy-scale difference between two experiments. We find that the TA data is compatible with isotropy to within 1.1σ and with the Auger result to within 1.4σ, meaning that it is not capable to discriminate between these two hypotheses. Copyright © 2018, The Authors. All rights reserved.

关键词： Augers

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Study of muons from ultra-high energy cosmic ray air showers measured with the Telescope Array experiment

arXiv

引用

arXiv 2018年

作者： Abbasi, R.U. Abe, M. Abu-Zayyad, T. Allen, M. Azuma, R. Barcikowski, E. Belz, J.W. Bergman, D.R. Blake, S.A. Cady, R. Cheon, B.G. Chiba, J. Chikawa, M. Di Matteo, A. Fujii, T. Fujita, K. Fukushima, M. Furlich, G. Goto, T. Hanlon, W. Hayashi, M. Hayashi, Y. Hayashida, N. Hibino, K. Honda, K. Ikeda, D. Inoue, N. Ishii, T. Ishimori, R. Ito, H. Ivanov, D. Jeong, H.M. Jeong, S.M. Jui, C.C.H. Kadota, K. Kakimoto, F. Kalashev, O. Kasahara, K. Kawai, H. Kawakami, S. Kawana, S. Kawata, K. Kido, E. Kim, H.B. Kim, J.H. Kim, J.H. Kishigami, S. Kitamura, S. Kitamura, Y. Kuzmin, V. Kuznetsov, M. Kwon, Y.J. Lee, K.H. Lubsandorzhiev, B. Lundquist, J.P. Machida, K. Martens, K. Matsuyama, T. Matthews, J.N. Mayta, R. Minamino, M. Mukai, K. Myers, I. Nagasawa, K. Nagataki, S. Nakamura, R. Nakamura, T. Nonaka, T. Oda, H. Ogio, S. Ogura, J. Ohnishi, M. Ohoka, H. Okuda, T. Omura, Y. Ono, M. Onogi, R. Oshima, A. Ozawa, S. Park, I.H. Pshirkov, M.S. Remington, J. Rodriguez, D.C. Rubtsov, G. Ryu, D. Sagawa, H. Sahara, R. Saito, K. Saito, Y. Sakaki, N. Sakurai, N. Scott, L.M. Seki, T. Sekino, K. Shah, P.D. Shibata, F. Shibata, T. Shimodaira, H. Shin, B.K. Shin, H.S. Smith, J.D. Sokolsky, P. Stokes, B.T. Stratton, S.R. Stroman, T.A. Suzawa, T. Takagi, Y. Takahashi, Y. Takamura, M. Takeda, M. Takeishi, R. Taketa, A. Takita, M. Tameda, Y. Tanaka, H. Tanaka, K. Tanaka, M. Thomas, S.B. Thomson, G.B. Tinyakov, P. Tkachev, I. Tokuno, H. Tomida, T. Troitsky, S. Tsunesada, Y. Tsutsumi, K. Uchihori, Y. Udo, S. Urban, F. Wong, T. Yamamoto, M. Yamane, R. Yamaoka, H. Yamazaki, K. Yang, J. Yashiro, K. Yoneda, Y. Yoshida, S. Yoshii, H. Zhezher, Y. Zundel, Z. High Energy Astrophysics Institute Department of Physics and Astronomy University of Utah Salt Lake CityUT United States Graduate School of Science and Engineering Saitama University SaitamaSaitama Japan Graduate School of Science and Engineering Tokyo Institute of Technology MeguroTokyo Japan Department of Physics Research Institute of Natural Science Hanyang University Seongdong-gu Seoul Czech Republic Department of Physics Tokyo University of Science NodaChiba Japan Department of Physics Kindai University Higashi OsakaOsaka Japan Service de Physique Théorique Université Libre de Bruxelles Brussels Belgium Institute for Cosmic Ray Research University of Tokyo KashiwaChiba Japan Graduate School of Science Osaka City University OsakaOsaka Japan Todai Institutes for Advanced Study University of Tokyo KashiwaChiba Japan Information Engineering Graduate School of Science and Technology Shinshu University NaganoNagano Japan Faculty of Engineering Kanagawa University YokohamaKanagawa Japan Interdisciplinary Graduate School of Medicine and Engineering University of Yamanashi KofuYamanashi Japan Astrophysical Big Bang Laboratory RIKEN WakoSaitama Japan Department of Physics Sungkyunkwan University Jang-an-gu Suwon Czech Republic Department of Physics Tokyo City University Setagaya-kuTokyo Japan Institute for Nuclear Research of the Russian Academy of Sciences Moscow Russia Advanced Research Institute for Science and Engineering Waseda University Shinjuku-kuTokyo Japan Department of Physics Chiba University ChibaChiba Japan Department of Physics School of Natural Sciences Ulsan National Institute of Science and Technology UNIST-gil Ulsan Czech Republic Department of Physics Yonsei University Seodaemun-gu Seoul Czech Republic Academic Assembly School of Science and Technology Institute of Engineering Shinshu University NaganoNagano Japan Faculty of Science Kochi University KochiKochi Japan Department of Physical Sciences Ritsum

One of the uncertainties in interpretation of ultra-high energy cosmic ray (UHECR) data comes from the hadronic interaction models used for air shower Monte Carlo (MC) simulations. The number of muons observed at the ground from UHECR-induced air showers is expected to depend upon the hadronic interaction model. One may therefore test the hadronic interaction models by comparing the measured number of muons with the MC prediction. In this paper, we present the results of studies of muon densities in UHE extensive air showers obtained by analyzing the signal of surface detector stations which should have high muon purity . The muon purity of a station will depend on both the inclination of the shower and the relative position of the station. In 7 years’ data from the Telescope Array experiment, we find that the number of particles observed for signals with an expected muon purity of ∼65% at a lateral distance of 2000 m from the shower core is 1.72 ± 0.10(stat.) ± 0.37(syst.) times larger than the MC prediction value using the QGSJET II-03 model for proton-induced showers. A similar effect is also seen in comparisons with other hadronic models such as QGSJET II-04, which shows a 1.67 ± 0.10 ± 0.36 excess. We also studied the dependence of these excesses on lateral distances and found a slower decrease of the lateral distribution of muons in the data as compared to the MC, causing larger discrepancy at larger lateral distances. Copyright © 2018, The Authors. All rights reserved.

关键词： Charged particles

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Depth of ultra high energy cosmic ray induced air shower maxima measured by the telescope array black rock and long ridge fadc fluorescence detectors and surface array in hybrid mode

arXiv

引用

arXiv 2018年

作者： Abbasi, R.U. Abe, M. Abu-Zayyad, T. Allen, M. Azuma, R. Barcikowski, E. Belz, J.W. Bergman, D.R. Blake, S.A. Cady, R. Cheon, B.G. Chiba, J. Chikawa, M. Fujii, T. Fujita, K. Fukushima, M. Furlich, G. Goto, T. Hanlon, William Hayashi, M. Hayashi, Y. Hayashida, N. Hibino, K. Honda, K. Ikeda, D. Inoue, N. Ishii, T. Ishimori, R. Ito, H. Ivanov, D. Jeong, S.M. Jui, C.C.H. Kadota, K. Kakimoto, F. Kalashev, O. Kasahara, K. Kawai, H. Kawakami, S. Kawana, S. Kawata, K. Kido, E. Kim, H.B. Kim, J.H. Kim, J.H. Kishigami, S. Kitamura, S. Kitamura, Y. Kuzmin, V. Kuznetsov, M. Kwon, Y.J. Lubsandorzhiev, B. Lundquist, J.P. Machida, K. Martens, K. Matsuyama, T. Matthews, J.N. Mayta, R. Minamino, M. Mukai, K. Myers, I. Nagasawa, K. Nagataki, S. Nakamura, R. Nakamura, T. Nonaka, T. Nozato, A. Oda, H. Ogio, S. Ogura, J. Ohnishi, M. Ohoka, H. Okuda, T. Omura, Y. Ono, M. Onogi, R. Oshima, A. Ozawa, S. Park, I.H. Pshirkov, M.S. Rodriguez, D.C. Rubtsov, G. Ryu, D. Sagawa, H. Sahara, R. Saito, K. Saito, Y. Sakaki, N. Sakurai, N. Scott, L.M. Seki, T. Sekino, K. Shah, P.D. Shibata, F. Shibata, T. Shimodaira, H. Shin, B.K. Shin, H.S. Smith, J.D. Sokolsky, P. Stokes, B.T. Stratton, S.R. Stroman, T.A. Suzawa, T. Takagi, Y. Takahashi, Y. Takamura, M. Takeda, M. Takeishi, R. Taketa, A. Takita, M. Tameda, Y. Tanaka, H. Tanaka, K. Tanaka, M. Thomas, S.B. Thomson, G.B. Tinyakov, P. Tkachev, I. Tokuno, H. Tomida, T. Troitsky, S. Tsunesada, Y. Tsutsumi, K. Uchihori, Y. Udo, S. Urban, F. Wong, T. Yamamoto, M. Yamane, R. Yamaoka, H. Yamazaki, K. Yang, J. Yashiro, K. Yoneda, Y. Yoshida, S. Yoshii, H. Zhezher, Y. Zundel, Z. High Energy Astrophysics Institute Department of Physics and Astronomy University of Utah Salt Lake CityUT United States Graduate School of Science and Engineering Saitama University Saitama Saitama Japan Graduate School of Science and Engineering Tokyo Institute of Technology Meguro Tokyo Japan Department of Physics Research Institute of Natural Science Hanyang University Seongdong-gu Seoul Korea Republic of Department of Physics Tokyo University of Science Noda Chiba Japan Department of Physics Kinki University Higashi Osaka Osaka Japan Institute for Cosmic Ray Research University of Tokyo Kashiwa Chiba Japan Graduate School of Science Osaka City University Osaka Osaka Japan Todai Institutes for Advanced Study University of Tokyo Kashiwa Chiba Japan Information Engineering Graduate School of Science and Technology Shinshu University Nagano Nagano Japan Faculty of Engineering Kanagawa University Yokohama Kanagawa Japan Interdisciplinary Graduate School of Medicine and Engineering University of Yamanashi Kofu Yamanashi Japan Astrophysical Big Bang Laboratory RIKEN Wako Saitama Japan Department of Physics Sungkyunkwan University Jang-an-gu Suwon Korea Republic of Department of Physics Tokyo City University Setagaya-ku Tokyo Japan Institute for Nuclear Research of the Russian Academy of Sciences Moscow Russia Advanced Research Institute for Science and Engineering Waseda University Shinjuku-ku Tokyo Japan Department of Physics Chiba University Chiba Chiba Japan Department of Physics School of Natural Sciences Ulsan National Institute of Science and Technology UNIST-gil Ulsan Korea Republic of Department of Physics Yonsei University Seodaemun-gu Seoul Korea Republic of Academic Assembly School of Science and Technology Institute of Engineering Shinshu University Nagano Nagano Japan Faculty of Science Kochi University Kochi Kochi Japan Department of Physical Sciences Ritsumeikan University Kusatsu Shiga Japan Sternberg

The Telescope Array observatory utilizes fluorescence detectors and surface detectors to observe air showers produced by ultra high energy cosmic rays in the Earth's atmosphere. Cosmic ray events observed in this way are termed hybrid data. The depth of air shower maximum is related to the mass of the primary particle that generates the shower. This paper reports on shower maxima data collected over 8.5 years using the Black Rock Mesa and Long Ridge fluorescence detectors in conjunction with the array of surface detectors. We compare the means and standard deviations of the observed Xmaxdistributions with Monte Carlo Xmaxdistributions of unmixed protons, helium, nitrogen, and iron, all generated using the QGSJet II-04 hadronic model. We also perform an unbinned maximum likelihood test of the observed data, which is subjected to variable systematic shifting of the data Xmaxdistributions to allow us to test the full distributions, and compare them to the Monte Carlo to see which elements are not compatible with the observed data. For all energy bins, QGSJet II-04 protons are found to be compatible with Telescope Array hybrid data at the 95% confidence level after some systematic Xmaxshifting of the data. Three other QGSJet II-04 elements are found to be compatible using the same test procedure in an energy range limited to the highest energies where data statistics are sparse. Copyright © 2018, The Authors. All rights reserved.

关键词： Cosmic rays

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Constraints on the diffuse photon flux with energies above 1018 eV using the surface detector of the Telescope Array experiment

arXiv

引用

arXiv 2018年

作者： Abbasi, R.U. Abe, M. Abu-Zayyad, T. Allen, M. Azuma, R. Barcikowski, E. Belz, J.W. Bergman, D.R. Blake, S.A. Cady, R. Cheon, B.G. Chiba, J. Chikawa, M. di Matteo, A. Fujii, T. Fujita, K. Fukushima, M. Furlich, G. Goto, T. Hanlon, W. Hayashi, M. Hayashi, Y. Hayashida, N. Hibino, K. Honda, K. Ikeda, D. Inoue, N. Ishii, T. Ishimori, R. Ito, H. Ivanov, D. Jeong, H.M. Jeong, S. Jui, C.C.H. Kadota, K. Kakimoto, F. Kalashev, O. Kasahara, K. Kawai, H. Kawakami, S. Kawana, S. Kawata, K. Kido, E. Kim, H.B. Kim, J.H. Kim, J.H. Kishigami, S. Kitamura, S. Kitamura, Y. Kuzmin, V. Kuznetsov, M. Kwon, Y.J. Lee, K.H. Lubsandorzhiev, B. Lundquist, J.P. Machida, K. Martens, K. Matsuyama, T. Matthews, J.N. Mayta, R. Minamino, M. Mukai, K. Myers, I. Nagasawa, K. Nagataki, S. Nakamura, R. Nakamura, T. Nonaka, T. Oda, H. Ogio, S. Ogura, J. Ohnishi, M. Ohoka, H. Okuda, T. Omura, Y. Ono, M. Onogi, R. Oshima, A. Ozawa, S. Park, I.H. Piskunov, M.S. Pshirkov, M.S. Remington, J. Rodriguez, D.C. Rubtsov, G.I. Ryu, D. Sagawa, H. Sahara, R. Saito, K. Saito, Y. Sakaki, N. Sakurai, N. Scott, L.M. Seki, T. Sekino, K. Shah, P.D. Shibata, F. Shibata, T. Shimodaira, H. Shin, B.K. Shin, H.S. Smith, J.D. Sokolsky, P. Stokes, B.T. Stratton, S.R. Stroman, T.A. Suzawa, T. Takagi, Y. Takahashi, Y. Takamura, M. Takeda, M. Takeishi, R. Taketa, A. Takita, M. Tameda, Y. Tanaka, H. Tanaka, K. Tanaka, M. Thomas, S.B. Thomson, G.B. Tinyakov, P. Tkachev, I. Tokuno, H. Tomida, T. Troitsky, S. Tsunesada, Y. Tsutsumi, K. Uchihori, Y. Udo, S. Urban, F. Wong, T. Yamamoto, M. Yamane, R. Yamaoka, H. Yamazaki, K. Yang, J. Yashiro, K. Yoneda, Y. Yoshida, S. Yoshii, H. Zhezher, Y. Zundel, Z. High Energy Astrophysics Institute Department of Physics and Astronomy University of Utah Salt Lake CityUT United States Graduate School of Science and Engineering Saitama University SaitamaSaitama Japan Graduate School of Science and Engineering Tokyo Institute of Technology MeguroTokyo Japan Department of Physics Research Institute of Natural Science Hanyang University Seongdong-gu Seoul Korea Republic of Department of Physics Tokyo University of Science NodaChiba Japan Department of Physics Kindai University Higashi OsakaOsaka Japan Service de Physique Thorique Universit Libre de Bruxelles Brussels Belgium Institute for Cosmic Ray Research University of Tokyo KashiwaChiba Japan Graduate School of Science Osaka City University OsakaOsaka Japan Todai Institutes for Advanced Study University of Tokyo KashiwaChiba Japan Information Engineering Graduate School of Science and Technology Shinshu University NaganoNagano Japan Faculty of Engineering Kanagawa University YokohamaKanagawa Japan Interdisciplinary Graduate School of Medicine and Engineering University of Yamanashi KofuYamanashi Japan Astrophysical Big Bang Laboratory RIKEN WakoSaitama Japan Department of Physics Sungkyunkwan University Jang-an-gu Suwon Korea Republic of Department of Physics Tokyo City University Setagaya-kuTokyo Japan Institute for Nuclear Research of the Russian Academy of Sciences Moscow Russia Advanced Research Institute for Science and Engineering Waseda University Shinjuku-kuTokyo Japan Department of Physics Chiba University ChibaChiba Japan Department of Physics School of Natural Sciences Ulsan National Institute of Science and Technology UNIST-gil Ulsan Korea Republic of Department of Physics Yonsei University Seodaemun-gu Seoul Korea Republic of Academic Assembly School of Science and Technology Institute of Engineering Shinshu University NaganoNagano Japan Faculty of Science Kochi University KochiKochi Japan Department of Physical Sc

We present the results of the search for ultra-high-energy photons with nine years of data from the Telescope Array surface detector. A multivariate classifier is built upon 16 reconstructed parameters of the extensive air shower. These parameters are related to the curvature and the width of the shower front, the steepness of the lateral distribution function, and the timing parameters of the waveforms sensitive to the shower muon content. A total number of two photon candidates found in the search is fully compatible with the expected background. The 95% CL limits on the diffuse flux of the photons with energies greater than 1018.0, 1018.5, 1019.0, 1019.5 and 1020.0 eV are set at the level of 0.067, 0.012, 0.0036, 0.0013, 0.0013 km−2yr−1sr−1 correspondingly. Copyright © 2018, The Authors. All rights reserved.

关键词： Photons

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Android Malware Detection Using Local Binary Pattern and Principal Component Analysis

Android Malware Detection Using Local Binary Pattern and Pri...

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The Third International Conference of Pioneering Computer Scientists, Engineers and Educators,ICPCSEE 2017(originally ICYCSEE)

作者： Qixin Wu Zheng Qin Jinxin Zhang Hui Yin Guangyi Yang Kuangsheng Hu College of Computer Science and Electronic Engineering Hunan University Hunan Key Laboratory of Big Data Research and Application Hunan Institute of Metrology and Test

Nowadays, analysis methods based on big data have been widely used in malicious software detection. Since Android has become the dominator of smartphone operating system market, the number of Android malicious applications are increasing rapidly as well, which attracts attention of malware attackers and researchers alike. Due to the endless evolution of the malware, it is critical to apply the analysis methods based on machine learning to detect malwares and stop them from leakaging our privacy information. In this paper, we propose a novel Android malware detection method based on binary texture feature recognition by Local Binary Pattern and Principal Component Analysis, which can visualize malware and detect malware accurately. Also,our method analyzes malware binary directly without any decompiler,sandbox or virtual machines, which avoid time and resource consumption caused by decompiler or monitor in this process. Experimentation on 5127 benigns and 5560 malwares shows that we obtain a detection accuracy of 90%.

关键词： Android malware detection Binary texture feature Local binary pattern Principal component analysis

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A cloud-based taxi trace mining framework for smart city

A cloud-based taxi trace mining framework for smart city

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作者： Liu, Jin Yu, Xiao Xu, Zheng Choo, Kim-Kwang Raymond Hong, Liang Cui, Xiaohui State Key Lab. of Software Engineering Computer School Wuhan University Wuhan China Third Research Institute of Ministry of Public Security Shanghai China Department of Information Systems and Cyber Security University of Texas at San Antonio San AntonioTX United States School of Information Technology and Mathematical Science University of South Australia AdelaideSA Australia School of Information Management Wuhan University Wuhan China International School of Software Wuhan University Wuhan China

As a well-known field of big data applications, smart city takes advantage of massive data analysis to achieve efficient management and sustainable development in the current worldwide urbanization process. An important problem in smart city is how to discover frequent trajectory sequence pattern and cluster trajectory. To solve this problem, this paper proposes a cloud-based taxi trajectory pattern mining and trajectory clustering framework for smart city. Our work mainly includes (1) preprocessing raw Global Positioning System trace by calling the Baidu API Geocoding;(2) proposing a distributed trajectory pattern mining (DTPM) algorithm based on Spark;and (3) proposing a distributed trajectory clustering (DTC) algorithm based on Spark. The proposed DTPM algorithm and DTC algorithm can overcome the high input/output overhead and communication overhead by adopting in-memory computation. In addition, the proposed DTPM algorithm can avoid generating redundant local trajectory patterns to significantly improve the overall performance. The proposed DTC algorithm can enhance the performance of trajectory similarity computation by transforming the trajectory similarity calculation into AND and OR operators. Experimental results indicate that DTPM algorithm and DTC algorithm can significantly improve the overall performance and scalability of trajectory pattern mining and trajectory clustering on massive taxi trace data. Copyright © 2016 John Wiley & Sons, Ltd. Copyright © 2016 John Wiley & Sons, Ltd.

关键词： Clustering algorithms

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Measurement of isolated photon-hadron correlations in √sNN = 5.02 TeV pp and p-Pb collisions

arXiv

引用

arXiv 2020年

作者： Acharya, S. Adamová, D. Adler, A. Adolfsson, J. Aglieri Rinella, G. Agnello, M. Agrawal, N. Ahammed, Z. Ahmad, S. Ahn, S.U. Ahuja, I. Akbar, Z. Akindinov, A. Al-Turany, M. Alam, S.N. Aleksandrov, D. Alessandro, B. Alfanda, H.M. Alfaro Molina, R. Ali, B. Ali, Y. Alici, A. Alizadehvandchali, N. Alkin, A. Alme, J. Alt, T. Altenkamper, L. Altsybeev, I. Anaam, M.N. Andrei, C. Andreou, D. Andronic, A. Angeletti, M. Anguelov, V. Antinori, F. Antonioli, P. Anuj, C. Apadula, N. Aphecetche, L. Appelshäuser, H. Arcelli, S. Arnaldi, R. Arsene, I.C. Arslandok, M. Augustinus, A. Averbeck, R. Aziz, S. Azmi, M.D. Badalà, A. Baek, Y.W. Bai, X. Bailhache, R. Bailung, Y. Bala, R. Balbino, A. Baldisseri, A. Balis, B. Ball, M. Banerjee, D. Barbera, R. Barioglio, L. Barlou, M. Barnaföldi, G.G. Barnby, L.S. Barret, V. Bartels, C. Barth, K. Bartsch, E. Baruffaldi, F. Bastid, N. Basu, S. Batigne, G. Batyunya, B. Bauri, D. Bazo Alba, J.L. Bearden, I.G. Beattie, C. Belikov, I. Bell Hechavarria, A.D.C. Bellini, F. Bellwied, R. Belokurova, S. Belyaev, V. Bencedi, G. Beole, S. Bercuci, A. Berdnikov, Y. Berdnikova, A. Berenyi, D. Bergmann, L. Besoiu, M.G. Betev, L. Bhaduri, P.P. Bhasin, A. Bhat, I.R. Bhat, M.A. Bhattacharjee, B. Bhattacharya, P. Bianchi, L. Bianchi, N. Bielčík, J. Bielčíková, J. Biernat, J. Bilandzic, A. Biro, G. Biswas, S. Blair, J.T. Blau, D. Blidaru, M.B. Blume, C. Boca, G. Bock, F. Bogdanov, A. Boi, S. Bok, J. Boldizsár, L. Bolozdynya, A. Bombara, M. Bond, P.M. Bonomi, G. Borel, H. Borissov, A. Bossi, H. Botta, E. Bratrud, L. Braun-Munzinger, P. Bregant, M. Broz, M. Bruno, G.E. Buckland, M.D. Budnikov, D. Buesching, H. Bufalino, S. Bugnon, O. Buhler, P. Buthelezi, Z. Butt, J.B. Bysiak, S.A. Caffarri, D. Cai, M. Caines, H. Caliva, A. Calvo Villar, E. Camacho, J.M.M. Camacho, R.S. Camerini, P. Canedo, F.D.M. Carnesecchi, F. Caron, R. Castillo Castellanos, J. Casula, E.A.R. Catalano, F. Bologna Italy Dipartimento DET del Politecnico di Torino Turin Italy M.V. Lomonosov Moscow State University D.V. Skobeltsyn Institute of Nuclear Physics Moscow Russia Institute of Theoretical Physics University of Wroclaw Poland Foundation Yerevan Armenia AGH University of Science and Technology Cracow Poland Bogolyubov Institute for Theoretical Physics National Academy of Sciences of Ukraine Kiev Ukraine Kolkata India Budker Institute for Nuclear Physics Novosibirsk Russia California Polytechnic State University San Luis ObispoCA United States Central China Normal University Wuhan China Havana Cuba Mexico City and Mérida Mexico Chicago State University ChicagoIL United States China Institute of Atomic Energy Beijing China Chungbuk National University Cheongju Korea Republic of Comenius University Bratislava Faculty of Mathematics Physics and Informatics Bratislava Slovakia COMSATS University Islamabad Islamabad Pakistan Creighton University OmahaNE United States Department of Physics Aligarh Muslim University Aligarh India Department of Physics Pusan National University Pusan Korea Republic of Department of Physics Sejong University Seoul Korea Republic of Department of Physics University of California BerkeleyCA United States Department of Physics University of Oslo Oslo Norway Department of Physics and Technology University of Bergen Bergen Norway Dipartimento di Fisica Università'La Sapienza' Sezione INFN Rome Italy Dipartimento di Fisica Università and Sezione INFN Cagliari Italy Dipartimento di Fisica Università and Sezione INFN Trieste Italy Dipartimento di Fisica Università and Sezione INFN Turin Italy Dipartimento di Fisica e Astronomia Università and Sezione INFN Bologna Italy Dipartimento di Fisica e Astronomia Università and Sezione INFN Catania Italy Dipartimento di Fisica e Astronomia Università and Sezione INFN Padova Italy Dipartimento di Fisica e Nucleare e Teorica Università di Pavia Pavia Italy Dipa

关键词： Photons

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HMOD： An Omics database for Herbal Medicine Plants

引用

Molecular Plant 2018年第5期11卷 757-759页

作者： Xiao Wang Jiajin Zhang Simei He Yuanni Gao Xiaoqin Ma Yun Gao Guanghui Zhang Ling Kui Wen Wang Ying wang Shengchao Yang Yang Dong State Key Laboratory of Genetic Resources and Evolution Kunming Institute of Zoology Chinese Academy of Sciences Kunming 650223 People's Republic of China Kunming College of Life Science University of Chinese Academy of Sciences Kunming 650204 People's Republic of China School of Information Engineering Yunnan Agricultural University Kunming 650201 People's Republic of China State Key Laboratory of Conservation and Utilization of Bio-resources in Yunnan The Key Laboratory of Medicinal Plant Biology of Yunnan ProvinceNational & Local Joint Engineering Research Center on Germplasms Innovation & Utilization of Chinese Medicinal Materials in Southwest China Yunnan Agricultural University Kunming 650201 People's Republic of China Nowbio Biotech Inc. Kunming 650201 People's Republic of China Province Key Laboratory Biological Big Data College Yunnan Agricultural University Kunming 650201 People's Republic of China Key Laboratory of South China Agricultural Plant Molecular Analysis andGenetic Improvement South China Botanical Garden Chinese Academy of Sciences Guangzhou 510650 People's Republic of China

Dear Editor ,More than 50% of drugs are derived from chemical compounds that have been isolated from various plants （Fabricant and Farnsworth, 2001; Yarnell and Abascal, 2002）. With the development of sequencing technology and synthetic biology, we can obtain molecular information from the transcriptomic and genomic data of plants and then utilize bacteria to synthesize desired chemical compounds （Atanasov et al., 2015; Smanski et al., 2016）. Increasing numbers of researchers have started to publish omics data generated from herbal plants.

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Soft-dielectron excess in proton–proton collisions at √s = 13 TeV

arXiv

引用

arXiv 2020年

作者： Acharya, S. Adamová, D. Adler, A. Adolfsson, J. Aggarwal, M.M. Rinella, G. Aglieri Agnello, M. Agrawal, N. Ahammed, Z. Ahmad, S. Ahn, S.U. Akbar, Z. Akindinov, A. Al-Turany, M. Alam, S.N. Albuquerque, D.S.D. Aleksandrov, D. Alessandro, B. Alfanda, H.M. Molina, R. Alfaro Ali, B. Ali, Y. Alici, A. Alizadehvandchali, N. Alkin, A. Alme, J. Alt, T. Altenkamper, L. Altsybeev, I. Anaam, M.N. Andrei, C. Andreou, D. Andronic, A. Angeletti, M. Anguelov, V. Anson, C. Antičić, T. Antinori, F. Antonioli, P. Apadula, N. Aphecetche, L. Appelshäuser, H. Arcelli, S. Arnaldi, R. Arratia, M. Arsene, I.C. Arslandok, M. Augustinus, A. Averbeck, R. Aziz, S. Azmi, M.D. Badalà, A. Baek, Y.W. Bagnasco, S. Bai, X. Bailhache, R. Bala, R. Balbino, A. Baldisseri, A. Ball, M. Balouza, S. Banerjee, D. Barbera, R. Barioglio, L. Barnaföldi, G.G. Barnby, L.S. Barret, V. Bartalini, P. Bartels, C. Barth, K. Bartsch, E. Baruffaldi, F. Bastid, N. Basu, S. Batigne, G. Batyunya, B. Bauri, D. Alba, J.L. Bazo Bearden, I.G. Beattie, C. Bedda, C. Behera, N.K. Belikov, I. Hechavarria, A.D.C. Bell Bellini, F. Bellwied, R. Belyaev, V. Bencedi, G. Beole, S. Bercuci, A. Berdnikov, Y. Berenyi, D. Bertens, R.A. Berzano, D. Besoiu, M.G. Betev, L. Bhasin, A. Bhat, I.R. Bhat, M.A. Bhatt, H. Bhattacharjee, B. Bianchi, A. Bianchi, L. Bianchi, N. Bielčík, J. Bielčíková, J. Bilandzic, A. Biro, G. Biswas, R. Biswas, S. Blair, J.T. Blau, D. Blume, C. Boca, G. Bock, F. Bogdanov, A. Boi, S. Bok, J. Boldizsár, L. Bolozdynya, A. Bombara, M. Bonomi, G. Borel, H. Borissov, A. Bossi, H. Botta, E. Bratrud, L. Braun-Munzinger, P. Bregant, M. Broz, M. Bruna, E. Bruno, G.E. Buckland, M.D. Budnikov, D. Buesching, H. Bufalino, S. Bugnon, O. Buhler, P. Buncic, P. Buthelezi, Z. Butt, J.B. Bysiak, S.A. Caffarri, D. Caliva, A. Villar, E. Calvo Camacho, J.M.M. Camacho, R.S. Camerini, P. Canedo, F.D.M. Capon, A.A. Carnesecchi, F. Caron, R. Castellanos, J. Castillo Foundation Yerevan Armenia Bogolyubov Institute for Theoretical Physics National Academy of Sciences of Ukraine Kiev Ukraine Kolkata India Budker Institute for Nuclear Physics Novosibirsk Russia California Polytechnic State University San Luis ObispoCA United States Central China Normal University Wuhan China Centre de Calcul de l’IN2P3 Villeurbanne Lyon France Havana Cuba Mexico City and Mérida Mexico Centro Fermi - Museo Storico della Fisica e Centro Studi e Ricerche "Enrico Fermi’ Rome Italy Chicago State University ChicagoIL United States China Institute of Atomic Energy Beijing China Comenius University Bratislava Faculty of Mathematics Physics and Informatics Bratislava Slovakia COMSATS University Islamabad Islamabad Pakistan Creighton University OmahaNE United States Department of Physics Aligarh Muslim University Aligarh India Department of Physics Pusan National University Pusan Korea Republic of Department of Physics Sejong University Seoul Korea Republic of Department of Physics University of California BerkeleyCA United States Department of Physics University of Oslo Oslo Norway Department of Physics and Technology University of Bergen Bergen Norway Dipartimento di Fisica dell’Università’La Sapienza’ and Sezione INFN Rome Italy Dipartimento di Fisica dell’Università Sezione INFN Cagliari Italy Dipartimento di Fisica dell’Università Sezione INFN Trieste Italy Dipartimento di Fisica dell’Università and Sezione INFN Turin Italy Dipartimento di Fisica e Astronomia dell’Università Sezione INFN Bologna Italy Dipartimento di Fisica e Astronomia dell’Università Sezione INFN Catania Italy Dipartimento di Fisica e Astronomia dell’Università and Sezione INFN Padova Italy Dipartimento di Fisica ‘E.R. Caianiello’ dell’Università Gruppo Collegato INFN Salerno Italy Dipartimento DISAT del Politecnico and Sezione INFN Turin Italy Dipartimento di Scienze e Innovazione Tecnologica dell’Università del Piemonte Orientale INFN Sezione

A measurement of dielectron production in proton–proton (pp) collisions at √s = 13 TeV, recorded with the ALICE detector at the CERN LHC, is presented in this Letter. The data set was recorded with a reduced magnetic solenoid field. This enables the investigation of a kinematic domain at low dielectron invariant mass mee and pair transverse momentum pT,ee that was previously inaccessible at the LHC. The cross section for dielectron production is studied as a function of mee, pT,ee, and event multiplicity dNch/dη. The expected dielectron rate from hadron decays, called hadronic cocktail, utilizes a parametrization of the measured η/π0 ratio in pp and proton-nucleus (p–A) collisions, assuming that this ratio shows no strong dependence on collision energy at low transverse momentum. Comparison of the measured dielectron yield to the hadronic cocktail at 0.15 ee 2 and for pT,ee ee and pT,ee are extracted and compared with calculations of dielectron production from hadronic bremsstrahlung and thermal radiation within a hadronic many-body approach. © 2020, CC BY.

关键词： Hadrons

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