检索结果-内蒙古大学图书馆

arXiv 2024年

作者： Taylor, Anthony J. Finkelstein, Steven L. Kocevski, Dale D. Jeon, Junehyoung Bromm, Volker Amorín, Ricardo O. Haro, Pablo Arrabal Backhaus, Bren E. Bagley, Micaela B. Bañados, Eduardo Bhatawdekar, Rachana Brooks, Madisyn Calabrò, Antonello Chávez Ortiz, Óscar A. Cheng, Yingjie Cleri, Nikko J. Cole, Justin W. Davis, Kelcey Dickinson, Mark Donnan, Callum Dunlop, James S. Ellis, Richard S. Fernández, Vital Fontana, Adriano Fujimoto, Seiji Giavalisco, Mauro Grazian, Andrea Guo, Jingsong Hathi, Nimish P. Holwerda, Benne W. Hirschmann, Michaela Inayoshi, Kohei Kartaltepe, Jeyhan S. Khusanova, Yana Koekemoer, Anton M. Kokorev, Vasily Larson, Rebecca L. Leung, Gene C.K. Lucas, Ray A. McLeod, Derek J. Napolitano, Lorenzo Onoue, Masafusa Pacucci, Fabio Papovich, Casey Pérez-González, Pablo G. Pirzkal, Nor Somerville, Rachel S. Trump, Jonathan R. Wilkins, Stephen M. Yung, L.Y. Aaron Zhang, Haowen Department of Astronomy The University of Texas at Austin AustinTX United States Department of Physics and Astronomy Colby College WatervilleME04901 United States Apartado 3004 Granada18080 Spain NSF's National Optical-Infrared Astronomy Research Laboratory 950 N. Cherry Ave. TucsonAZ85719 United States Department of Physics University of Connecticut 196 Auditorium Road Unit 3046 StorrsCT06269 United States Max-Planck-Institut für Astronomie Königstuhl 17 HeidelbergD-69117 Germany Camino Bajo del Castillo s/n Villanueva de la Cañada Madrid28692 Spain INAF - Osservatorio Astronomico di Roma via di Frascati 33 Monte Porzio Catone00078 Italy University of Massachusetts Amherst 710 North Pleasant Street AmherstMA01003-9305 United States Department of Astronomy and Astrophysics The Pennsylvania State University University ParkPA16802 United States Institute for Computational and Data Sciences The Pennsylvania State University University ParkPA16802 United States Institute for Gravitation and the Cosmos The Pennsylvania State University University ParkPA16802 United States Department of Physics and Astronomy Texas A&M University College StationTX77843-4242 United States George P. and Cynthia Woods Mitchell Institute for Fundamental Physics and Astronomy Texas A&M University College StationTX77843-4242 United States Institute for Astronomy University of Edinburgh Royal Observatory EdinburghEH9 3HJ United Kingdom SUPA Institute for Astronomy University of Edinburgh Royal Observatory EdinburghEH9 3HJ United Kingdom Department of Physics and Astronomy University College London Gower Street LondonWC1E 6BT United Kingdom Instituto de Investigación Multidisciplinar en Ciencia y Tecnología Universidad de La Serena Raul Bitrán 1305 La Serena2204000 Chile Jagtvej 128 Copenhagen NDK2200 Denmark Niels Bohr Institute University of Copenhagen Lyngbyvej 2 Copenhagen ØDK2100 Denmark INAF-Osservatorio Astronomico di Padova Vicolo dell'

We present a sample of 50 Hα detected broad-line active galactic nuclei (BLAGN) at redshifts 3.5 opt > 0), independent of the contributions of emission lines to the broadband photometry. We construct the black hol... 详细信息

关键词： Active Galactic Nuclei

来源：评论

学校读者我要写书评

暂无评论

Joint Analysis of BICEP2/Keck Array and Planck data

引用

Physical Review Letters 2015年第10期114卷 101301-101301页

作者： P. A. R. Ade N. Aghanim Z. Ahmed R. W. Aikin K. D. Alexander M. Arnaud J. Aumont C. Baccigalupi A. J. Banday D. Barkats R. B. Barreiro J. G. Bartlett N. Bartolo E. Battaner K. Benabed A. Benoît A. Benoit-Lévy S. J. Benton J.-P. Bernard M. Bersanelli P. Bielewicz C. A. Bischoff J. J. Bock A. Bonaldi L. Bonavera J. R. Bond J. Borrill F. R. Bouchet F. Boulanger J. A. Brevik M. Bucher I. Buder E. Bullock C. Burigana R. C. Butler V. Buza E. Calabrese J.-F. Cardoso A. Catalano A. Challinor R.-R. Chary H. C. Chiang P. R. Christensen L. P. L. Colombo C. Combet J. Connors F. Couchot A. Coulais B. P. Crill A. Curto F. Cuttaia L. Danese R. D. Davies R. J. Davis P. de Bernardis A. de Rosa G. de Zotti J. Delabrouille J.-M. Delouis F.-X. Désert C. Dickinson J. M. Diego H. Dole S. Donzelli O. Doré M. Douspis C. D. Dowell L. Duband A. Ducout J. Dunkley X. Dupac C. Dvorkin G. Efstathiou F. Elsner T. A. Enßlin H. K. Eriksen E. Falgarone J. P. Filippini F. Finelli S. Fliescher O. Forni M. Frailis A. A. Fraisse E. Franceschi A. Frejsel S. Galeotta S. Galli K. Ganga T. Ghosh M. Giard E. Gjerløw S. R. Golwala J. González-Nuevo K. M. Górski S. Gratton A. Gregorio A. Gruppuso J. E. Gudmundsson M. Halpern F. K. Hansen D. Hanson D. L. Harrison M. Hasselfield G. Helou S. Henrot-Versillé D. Herranz S. R. Hildebrandt G. C. Hilton E. Hivon M. Hobson W. A. Holmes W. Hovest V. V. Hristov K. M. Huffenberger H. Hui G. Hurier K. D. Irwin A. H. Jaffe T. R. Jaffe J. Jewell W. C. Jones M. Juvela A. Karakci K. S. Karkare J. P. Kaufman B. G. Keating S. Kefeli E. Keihänen S. A. Kernasovskiy R. Keskitalo T. S. Kisner R. Kneissl J. Knoche L. Knox J. M. Kovac N. Krachmalnicoff M. Kunz C. L. Kuo H. Kurki-Suonio G. Lagache A. Lähteenmäki J.-M. Lamarre A. Lasenby M. Lattanzi C. R. Lawrence E. M. Leitch R. Leonardi F. Levrier A. Lewis M. Liguori P. B. Lilje M. Linden-Vørnle M. López-Caniego P. M. Lubin M. Lueker J. F. Macías-Pérez B. Maffei D. Maino N. Mandolesi A. Mangilli M. Maris P. G. Martin E. Martínez-González S. Masi P. Mason S. Matarrese K. G. Megerian School of Physics and Astronomy Cardiff University Queens Buildings The Parade Cardiff CF24 3AA United Kingdom Institut d’Astrophysique Spatiale CNRS (UMR8617) Université Paris-Sud 11 Bâtiment 121 Orsay France Department of Physics Stanford University Stanford California 94305 USA California Institute of Technology Pasadena California USA Harvard-Smithsonian Center for Astrophysics 60 Garden Street MS 42 Cambridge Massachusetts 02138 USA Laboratoire AIM IRFU/Service d’Astrophysique–CEA/DSM–CNRS–Université Paris Diderot Bâtiment 709 CEA-Saclay F-91191 Gif-sur-Yvette Cedex France SISSA Astrophysics Sector via Bonomea 265 34136 Trieste Italy Université de Toulouse UPS-OMP IRAP F-31028 Toulouse cedex 4 France CNRS IRAP 9 Avenue colonel Roche BP 44346 F-31028 Toulouse cedex 4 France Joint ALMA Observatory Vitacura Santiago Chile Instituto de Física de Cantabria (CSIC-Universidad de Cantabria) Avenida de los Castros s/n Santander Spain APC AstroParticule et Cosmologie Université Paris Diderot CNRS/IN2P3 CEA/lrfu Observatoire de Paris Sorbonne Paris Cité 10 rue Alice Domon et Léonie Duquet 75205 Paris Cedex 13 France Jet Propulsion Laboratory California Institute of Technology 4800 Oak Grove Drive Pasadena California USA Dipartimento di Fisica e Astronomia G. Galilei Università degli Studi di Padova via Marzolo 8 35131 Padova Italy Istituto Nazionale di Fisica Nucleare Sezione di Padova via Marzolo 8 I-35131 Padova Italy University of Granada Departamento de Física Teórica y del Cosmos Facultad de Ciencias Granada Spain University of Granada Instituto Carlos I de Física Teórica y Computacional Granada Spain Institut d’Astrophysique de Paris CNRS (UMR7095) 98 bis Boulevard Arago F-75014 Paris France UPMC Université de Paris 06 UMR7095 98 bis Boulevard Arago F-75014 Paris France Institut Néel CNRS Université Joseph Fourier Grenoble I 25 rue des Martyrs Grenoble France Department of Physics and Astronomy University College London L

We report the results of a joint analysis of data from BICEP2/Keck Array and Planck. BICEP2 and Keck Array have observed the same approximately 400 deg2 patch of sky centered on RA 0 h, Dec. −57.5°. The combined maps reach a depth of 57 nK deg in Stokes Q and U in a band centered at 150 GHz. Planck has observed the full sky in polarization at seven frequencies from 30 to 353 GHz, but much less deeply in any given region (1.2 μK deg in Q and U at 143 GHz). We detect 150×353 cross-correlation in B modes at high significance. We fit the single- and cross-frequency power spectra at frequencies ≥150 GHz to a lensed-ΛCDM model that includes dust and a possible contribution from inflationary gravitational waves (as parametrized by the tensor-to-scalar ratio r), using a prior on the frequency spectral behavior of polarized dust emission from previous Planck analysis of other regions of the sky. We find strong evidence for dust and no statistically significant evidence for tensor modes. We probe various model variations and extensions, including adding a synchrotron component in combination with lower frequency data, and find that these make little difference to the r constraint. Finally, we present an alternative analysis which is similar to a map-based cleaning of the dust contribution, and show that this gives similar constraints. The final result is expressed as a likelihood curve for r, and yields an upper limit r0.05<0.12 at 95% confidence. Marginalizing over dust and r, lensing B modes are detected at 7.0σ significance.

关键词： STOKES equations FREQUENCIES of oscillating systems POWER spectra GRAVITATIONAL waves

来源：评论

学校读者我要写书评

暂无评论

computational Approaches to Explainable Artificial Intelligence: Advances Intheory, Applications and Trends

SSRN

引用

SSRN 2023年

作者： Górriz, Juan Manuel Álvarez-Illán, I. Álvarez-Marquina, A. Arco, J.E. Atzmueller, M. Ballarini, F. Barakova, E. Bologna, G. Bonomini, P. Castellanos-Dominguez, G. Castillo-Barnes, D. Cho, S.B. Contreras, R. Cuadra, J.M. Domínguez, E. Domínguez-Mateos, F. Duro, R.J. Elizondo, D. Fernández-Caballero, A. Fernandez-Jover, E. Formoso, M.A. Gallego-Molina, N.J. Gamazo, J. García González, J. Garcia-Rodriguez, J. Garre, C. Garrigós, J. Gómez-Rodellar, A. Gómez-Vilda, P. Graña, M. Guerrero-Rodriguez, B. Hendrikse, S.C.F. Jimenez-Mesa, C. Jodra-Chuan, M. Julian, V. Kotz, G. Kutt, K. Leming, M. de Lope, J. Macas, B. Marrero-Aguiar, V. Martinez, J.J. Martinez-Murcia, F.J. Martínez-Tomás, R. Mekyska, J. Nalepa, G.J. Novais, P. Orellana, D. Ortiz, A. Palacios-Alonso, D. Palma, J. Pereira, A. Pinacho-Davidson, P. Pinninghoff, M.A. Ponticorvo, M. Psarrou, A. Ramírez, J. Rincón, M. Rodellar-Biarge, V. Rodríguez-Rodríguez, I. Roelofsma, P.H.M.P. Santos, J. Salas-Gonzalez, D. Salcedo-Lagos, P. Segovia, F. Shoeibi, A. Silva, M. Simic, D. Suckling, J. Treur, J. Tsanas, A. Varela, R. Wang, S.H. Wang, W. Zhang, Y.D. Zhu, H. Zhu, Z. Ferrández-Vicente, J.M. SiPBA at Data Science and Computational Intelligence Institute University of Granada Granada Spain University of Granada Granada Spain Dept. of Psychiatry University of Cambridge Cambridge United Kingdom Dept. of Communications Engineering University of Malaga Malaga Spain School of Computing and Mathematical Sciences University of Leicester Leicester United Kingdom Semantic Information Systems Group Osnabrück University Osnabrück Germany Osnabrück Germany Dept. of Electronics Computer Technology and Projects Universidad Politécnica de Cartagena Cartagena Spain Universitat Politècnica de València València Spain Institute of Applied Computer Science Jagiellonian University Kraków Poland Dept. of Information and Communication Engineering University of Murcia Murcia Spain Dept. of Computer Science and Information Technologies University of A Coruña A Coruña Spain Dept. of Computer Science University of Oviedo Oviedo Spain Buenos Aires Argentina Buenos Aires Argentina Eindhoven University of Technology Eindhoven5612 AZ Netherlands Dept. of Computer Science University of Malaga Malaga Spain De Montfort University Leicester United Kingdom Dept. of Computer Science Faculty of Engineering Universidad de Concepción Concepción Chile Neurocognition and Emotion Research Unit Albacete Research Institute of Informatics University of Castilla-La Mancha Albacete Spain Dept. of Educational Informatics Universidad de Concepción Concepción Chile Madrid Spain Dept. of Humanistic Studies University of Naples Federico II Napoli Italy Escuela Técnica Superior de Ingeniería Informática Universidad Rey Juan Carlos Campus de Móstoles Móstoles Madrid28933 Spain Neuromorphic Speech Processing Lab Center for Biomedical Technology Universidad Politécnica de Madrid Campus de Montegancedo Pozuelo de Alarcón Madrid28223 Spain Biomedical Research Networking Center in Mental Health Instituto de Salud Carlos III Madrid28016 Spain Usher Institute Faculty o

Groundbreaking advances in theoretical and applied Artificial Intelligence (AI). DL algorithms are groundedin non-linear and complex artificial neural systems that progressively extract higher-level features from *** is frequently compared with human-level performance in real-world tasks, such as clinical diagnostics. Itis also a turning point in solving otherwise intractable problems in the design of virtual agents or robotics;orin providing novel insight into disease progress in genomics and Neuroimaging (NI), understanding humanbrain function, the automation of industrial processes based on computer vision, and so on. In this paper, themost relevant advances from the last few years in AI and several applications to neuroscience, neuroimaging,computer vision, and robotics are presented, reviewed and discussed. In this way, we summarize the state-ofthe-art in AI methods, models and applications within a collection of works presented at the 9th InternationalConference on the Interplay between Natural and Artificial Computation (IWINAC). The works presentedin this paper are excellent examples of new scientific discoveries made in laboratories that are successfullytransferred to real-life applications. © 2023, The Authors. All rights reserved.

关键词： Neuroimaging

来源：评论

学校读者我要写书评

暂无评论

ASYNCHRONOUS TRANSFER MODE (ATM) OPERATION VIA SATELLITE - ISSUES, CHALLENGES AND RESOLUTIONS

引用

INTERNATIONAL JOURNAL OF SATELLITE COMMUNICATIONS 1994年第3期12卷 211-222页

作者： CHITRE, DM GOKHALE, DS HENDERSON, T LUNSFORD, JL MATHEWS, N COMSAT Laboratories 22300 Comsat Drive Clarksburg MD 20871 USA. Received his B.Sc. from the University of Bombay India an M.A. in mathematics from the University of Cambridge U.K. and a Ph.D. in physics from the University of Maryland. He is currently an Associate Executive Director of the Network Technology Division at COMSAT Laboratories. He has been involved in research and development activities in ISDN VSAT networks data communications and network systems and architectures. Prior to his current positions Dr. Chitre was a Principal Scientist in the Network Technology Division at COMSAT Laboratories. Dr. Chitre joined COMSAT Laboratories in 1980. He has made major contributions to the analysis and architecture of data communication ISDN and BISDN via satellite. Dr. Chitre directs and participates in the international and national standards activities in ISDN BISDN and data communication as they apply to satellite communication. He was Chairman of the Working Group on Protocols and Network Timing Function of the CCIR/CCITT Joint Ad Hoc Group on ISDN-Satellite Matters during 1990–1992. Currently he is the Chairman of the Working Group on New Technologies in the ITU Intersector Coordinating Group (ICG) on Satellite Matters. Dr. Chitre was a programme manager during 1990 and 1991 on a contract from INTELSAT on systems studies on satellite communications systems architectures for ISDN and broadband ISDN systems. Currently he is the technical manager of the DoD Contract on ATM via satellite demonstration and the programme manager for the INTELSAT contract on analysis and top-level specification of INTELSAT ISDN subnetworks and SDH compatible transport network. Department manager for ISDN/Data Communications in the Network Technology Division of COMSAT Laboratories. His responsibilities include managing the implementation of next generation telecommunication systems for fixed and mobile satellite systems. Current projects include the development of a high data rate gateway switch that provides for the

Key issues regarding the operation of the broadband integrated services digital network (BISDN) via satellite are presented herein. The specific issues, challenges, and their resolutions are detailed. In particular, the impact of error characteristics and propagation delay on the operation of BISDN via satellite is discussed. Solutions are presented for removing adverse effects and providing high-quality service to users of BISDN via satellite.

关键词： ATM BISDN

来源：评论

学校读者我要写书评

暂无评论

Supermassive Black Hole Winds in X-rays – SUBWAYS. III. A population study on ultra-fast outflows

arXiv

引用

arXiv 2024年

作者： Gianolli, Vittoria Elvezia Bianchi, S. Petrucci, P.-O. Brusa, M. Chartas, G. Lanzuisi, G. Matzeu, G.A. Parra Ursini, F. Behar, E. Bischetti, M. Comastri, A. Costantini, E. Cresci, G. Dadina, M. De, B. Marco, M. De Rosa, A. Fiore, F. Gaspari, M. Gilli, R. Giustini, M. Guainazzi, M. King, A.R. Kraemer, S. Kriss, G. Krongold, Y. La Franca, F. Longinotti, A.L. Luminari, A. Maiolino Marconi, R.A. Mathur, S. Matt, G. Mehdipour, M. Merloni, A. Middei, R. Miniutti, G. Nardini, E. Panessa, F. Perna, M. Piconcelli, E. Ponti, G. Ricci, F. Serafinelli, R. Tombesi, F. Vignali, C. Zappacosta, L. Université Grenoble Alpes CNRS IPAG Grenoble38000 France Dipartimento di Matematica e Fisica Università degli Studi Roma Tre Via della Vasca Navale 84 Roma00146 Italy University of Bologna Via Gobetti 93/2 BolognaI-40129 Italy INAF-Osservatorio di Astrofisica e Scienza dello Spazio di Bologna Via Gobetti 93/3 BolognaI-40129 Italy Villanueva de la Cañada MadridE-28691 Spain Department of Physics and Astronomy College of Charleston CharlestonSC29424 United States Physics Department The Technion Haifa32000 Israel Dipartimento di Fisica Universitá di Trieste Sezione di Astronomia Via G.B. Tiepolo 11 TriesteI-34131 Italy SRON Netherlands Institute for Space Research Niels Bohrweg 4 CA Leiden2333 Netherlands INAF Osservatorio Astrofisico di Arcetri Largo Enrico Fermi 5 Firenze50125 Italy Departament de Física EEBE Universitat Politècnica de Catalunya Av. Eduard Maristany 16 Barcelona08019 Spain INAF Osservatorio Astronomico di Trieste Via G. B. Tiepolo 11 Trieste34143 Italy Department of Astrophysical Sciences Princeton University 4 Ivy Lane PrincetonNJ08544-1001 United States CSIC-INTA Campus ESAC Camino Bajo del Castillo s/n Villanueva de la Cañada Madrid28692 Spain Keplerlaan 1 Noordwijk2201 AZ Netherlands Department of Physics & Astronomy University of Leicester LeicesterLE1 7RH United Kingdom Astronomical Institute Anton Pannekoek University of Amsterdam Science Park 904 NL-1098 XH Netherlands Department of Physics Institute for Astrophysics and Computational Sciences The Catholic University of America WashingtonDC20064 United States Space Telescope Science Institute 3700 San Martin Drive BaltimoreMD21218 United States Instituto de Astronomía Universidad Nacional Autónoma de México Circuito Exterior Ciudad Universitaria Ciudad de México04510 Mexico INAF Istituto di Astrofisica e Planetologia Spaziali Via Fosso del Cavaliere Roma00133 Italy INAF Osservatorio Astronomico di Roma Via Frascati 33 Monte Po

The detection of blueshifted absorption lines likely associated with ionized iron K-shell transitions in the X-ray spectra of many active galactic nuclei (AGNs) suggests the presence of a highly ionized gas outflowing with mildly relativistic velocities (0.03c - 0.6c) named ultra-fast outflow (UFO). Within the SUBWAYS project, we characterized these winds starting from a sample of 22 radio-quiet quasars at an intermediate redshift (0.1 ≤ z ≤ 0.4) and compared the results with similar studies in the literature on samples of local Seyfert galaxies (i.e., 42 radio-quiet AGNs observed with XMM-Newton at z ≤ 0.1) and high redshift radio-quiet quasars (i.e., 14 AGNs observed with XMM-Newton and Chandra at z ≥ 1.4). The scope of our work is a statistical study of UFO parameters and incidence considering the key physical properties of the sources, such as supermassive black hole (SMBH) mass, bolometric luminosity, accretion rates, and spectral energy distribution (SED) with the aim of gaining new insights into the UFO launching mechanisms. We find indications that highly luminous AGNs with a steeper X-ray/UV ratio, αox, are more likely to host UFOs. The presence of UFOs is not significantly related to any other AGN property in our sample. These findings suggest that the UFO phenomenon may be transient. Focusing on AGNs with UFOs, other important findings from this work include: (1) faster UFOs have larger ionization parameters and column densities;(2) X-ray radiation plays a more crucial role in driving highly ionized winds compared to UV;(3) the correlation between outflow velocity and luminosity is significantly flatter than what is expected for radiatively driven winds;(4) more massive black holes experience higher wind mass losses, suppressing the accretion of matter onto the black hole;(5) the UFO launching radius is positively correlated with the Eddington ratio. Furthermore, our analysis suggests the involvement of multiple launching mechanisms, including radiation p

关键词： Active Galactic Nuclei

来源：评论

学校读者我要写书评

暂无评论

Exploring cosmic origins with CORE: Mitigation of systematic effects

arXiv

引用

arXiv 2017年

作者： Natoli, P. Ashdown, M. Banerji, R. Borrill, J. Buzzelli, A. de Gasperis, G. Delabrouille, J. Hivon, E. Molinari, D. Patanchon, G. Polastri, L. Tomasi, M. Bouchet, F.R. Henrot-Versillé, S. Hoang, D.T. Keskitalo, R. Kiiveri, K. Kisner, T. Lindholm, V. McCarthy, D. Piacentini, F. Perdereau, O. Polenta, G. Tristram, M. Achucarro, A. Ade, P. Allison, R. Baccigalupi, C. Ballardini, M. Banday, A.J. Bartlett, J. Bartolo, N. Basak, S. Baselmans, J. Baumann, D. Bersanelli, M. Bonaldi, A. Bonato, M. Boulanger, F. Brinckmann, T. Bucher, M. Burigana, C. Cai, Z.-Y. Calvo, M. Carvalho, C.-S. Castellano, G. Challinor, A. Chluba, J. Clesse, S. Colantoni, I. Coppolecchia, A. Crook, M. D'Alessandro, G. de Bernardis, P. de Zotti, G. Di Valentino, E. Diego, J.-M. Errard, J. Feeney, S. Fernandez-Cobos, R. Finelli, F. Forastieri, F. Galli, S. Genova-Santos, R. Gerbino, M. González-Nuevo, J. Grandis, S. Greenslade, J. Gruppuso, A. Hagstotz, S. Hanany, S. Handley, W. Hernandez-Monteagudo, C. Hervías-Caimapo, C. Hills, M. Keihänen, E. Kitching, T. Kunz, M. Kurki-Suonio, H. Lamagna, L. Lasenby, A. Lattanzi, M. Lesgourgues, J. Lewis, A. Liguori, M. López-Caniego, M. Luzzi, G. Maffei, B. Mandolesi, N. Martinez-González, E. Martins, C.J.A.P. Masi, S. Melchiorri, A. Melin, J.-B. Migliaccio, M. Monfardini, A. Negrello, M. Notari, A. Pagano, L. Paiella, A. Paoletti, D. Piat, M. Pisano, G. Pollo, A. Poulin, V. Quartin, M. Remazeilles, M. Roman, M. Rossi, G. Rubino-Martin, J.-A. Salvati, L. Signorelli, G. Tartari, A. Tramonte, D. Trappe, N. Trombetti, T. Tucker, C. Valiviita, J. van de Weijgaert, R. van Tent, B. Vennin, V. Vielva, P. Vittorio, N. Wallis, C. Young, K. Zannoni, M. Dipartimento di Fisica e Scienze della Terra Università di Ferrara Via Saragat 1 Ferrara44122 Italy INFN Sezione di Ferrara Via Saragat 1 Ferrara44122 Italy Astrophysics Group Cavendish Laboratory University of Cambridge J. J. Thomson Avenue CambridgeCB3 0HE United Kingdom Kavli Institute for Cosmology Univerisity of Cambridge Madingley Road CambridgeCB3 0HA United Kingdom APC AstroParticule et Cosmologie Université Paris Diderot CNRS/IN2P3 CEA/lrfu Observatoire de Paris Sorbonne Paris Cité 10 rue Alice Domon et Léonie Duquet Paris Cedex 1375205 France Computational Cosmology Center Lawrence Berkeley National Laboratory BerkeleyCA United States Space Sciences Laboratory University of California BerkeleyCA94720 United States Dipartimento di Fisica Università di Roma La Sapienza P.le A. Moro 2 Roma00185 Italy Dipartimento di Fisica Università di Roma Tor Vergata Via della Ricerca Scientifica 1 RomaI-00133 Italy INFN Sezione di Tor Vergata Via della Ricerca Scientifica 1 RomaI-00133 Italy ParisF-75014 France INAF/IASF Bologna via Gobetti 101 BolognaI-40129 Italy Dipartimento di Fisica Università degli Studi di Milano Via Celoria 16 Milano Italy INAF/IASF Milano Via E. Bassini 15 Milano Italy Laboratoire de l'Accélérateur Linéaire Univ. Paris-Sud CNRS/IN2P3 Université Paris-Saclay Orsay France Department of Physics Gustaf Hällströmin katu 2a University of Helsinki Helsinki Finland Helsinki Institute of Physics University of Helsinki Gustaf Hällströmin katu 2 Helsinki Finland Department of Experimental Physics Maynooth University Maynooth Co. KildareW23 F2H6 Ireland INFN Sezione di Roma P.le Aldo Moro 5 RomaI-00185 Italy Agenzia Spaziale Italiana Science Data Center Via del Politecnico snc Roma00133 Italy INAF - Osservatorio Astronomico di Roma via di Frascati 33 Monte Porzio Catone Italy Instituut-Lorentz for Theoretical Physics Universiteit Leiden Leiden2333 CA Netherlands Department of Theoretical Physics Univ

We present an analysis of the main systematic effects that could impact the measurement of CMB polarization with the proposed CORE space mission. We employ timeline-to-map simulations to verify that the CORE instrumental set-up and scanning strategy allow us to measure sky polarization to a level of accuracy adequate to the mission science goals. We also show how the CORE observations can be processed to mitigate the level of contamination by potentially worrying systematics, including intensity-to-polarization leakage due to bandpass mismatch, asymmetric main beams, pointing errors and correlated noise. We use analysis techniques that are well validated on data from current missions such as Planck to demonstrate how the residual contamination of the measurements by these effects can be brought to a level low enough not to hamper the scientific capability of the mission, nor significantly increase the overall error budget. We also present a prototype of the CORE photometric calibration pipeline, based on that used for Planck, and discuss its robustness to systematics, showing how CORE can achieve its calibration requirements. While a fine-grained assessment of the impact of systematics requires a level of knowledge of the system that can only be achieved in a future study phase, the analysis presented here strongly suggests that the main areas of concern for the CORE mission can be addressed using existing knowledge, techniques and algorithms. Copyright © 2017, The Authors. All rights reserved.

关键词： Calibration

来源：评论

学校读者我要写书评

暂无评论

Two Remarkably Luminous Galaxy Candidates at z ≈ 10 − 12 Revealed by JWST

arXiv

引用

arXiv 2022年

作者： Naidu, Rohan P. Oesch, Pascal A. van Dokkum, Pieter Nelson, Erica J. Suess, Katherine A. Brammer, Gabriel Whitaker, Katherine E. Illingworth, Garth Bouwens, Rychard Tacchella, Sandro Matthee, Jorryt Allen, Natalie Bezanson, Rachel Conroy, Charlie Labbe, Ivo Leja, Joel Leonova, Ecaterina Magee, Dan Price, Sedona H. Setton, David J. Strait, Victoria Stefanon, Mauro Toft, Sune Weaver, John R. Weibel, Andrea Center for Astrophysics | Harvard & Smithsonian 60 Garden Street CambridgeMA02138 United States MIT Kavli Institute for Astrophysics and Space Research 77 Massachusetts Ave. CambridgeMA02139 United States Department of Astronomy University of Geneva Chemin Pegasi 51 Versoix1290 Switzerland Niels Bohr Institute University of Copenhagen Jagtvej 128 København NDK-2200 Denmark Astronomy Department Yale University 52 Hillhouse Ave New HavenCT06511 United States Department for Astrophysical and Planetary Science University of Colorado BoulderCO80309 United States Department of Astronomy and Astrophysics University of California Santa Cruz 1156 High Street Santa CruzCA95064 United States Kavli Institute for Particle Astrophysics and Cosmology Department of Physics Stanford University StanfordCA94305 United States Department of Astronomy University of Massachusetts AmherstMA01003 United States Denmark Department of Astronomy and Astrophysics University of California Santa CruzCA95064 United States Leiden Observatory Leiden University LeidenNL-2300 RA Netherlands Kavli Institute for Cosmology University of Cambridge Madingley Road CambridgeCB3 0HA United Kingdom Cavendish Laboratory University of Cambridge 19 JJ Thomson Avenue CambridgeCB3 0HE United Kingdom Department of Physics ETH Zürich Wolfgang-Pauli-Strasse 27 Zürich8093 Switzerland Department of Physics and Astronomy PITT PACC University of Pittsburgh PittsburghPA15260 United States Centre for Astrophysics and Supercomputing Swinburne University of Technology MelbourneVIC3122 Australia Department of Astronomy & Astrophysics The Pennsylvania State University University ParkPA16802 United States Institute for Computational & Data Sciences The Pennsylvania State University University ParkPA United States Institute for Gravitation and the Cosmos The Pennsylvania State University University ParkPA16802 United States GRAPPA Anton Pannekoek Institute for Astronomy Insti

The first few hundred Myrs at z > 10 mark the last major uncharted epoch in the history of the Universe, where only a single galaxy (GNz11 at z ≈ 11) is currently spectroscopically confirmed. Here we present a search for luminous z > 10 galaxies with JWST/NIRCam photometry spanning ≈ 1 − 5µm and covering 49 arcmin2 from the public JWST Early Release Science programs (CEERS and GLASS). Our most secure candidates are two MUV ≈ −21 systems: GLASS-z12 and GLASS-z10. These galaxies display abrupt & 1.8 mag breaks in their spectral energy distributions, consistent with complete absorption of flux bluewards of Lyman-α that is redshifted to z = 12.4+0.1−0.3 and z = 10.4+0.4−0.5. Lower redshift interlopers such as quiescent galaxies with strong Balmer breaks would be comfortably detected at > 5σ in multiple bands where instead we find no flux. From SED modeling we infer that these galaxies have already built up ∼ 109 solar masses in stars over the. 300−400 Myrs after the Big Bang. The brightness of these sources enable morphological constraints. Tantalizingly, GLASS-z10 shows a clearly extended exponential light profile, potentially consistent with a disk galaxy of r50 ≈ 0.7 kpc. These sources, if confirmed, join GNz11 in defying number density forecasts for luminous galaxies based on Schechter UV luminosity functions, which require a survey area > 10× larger than we have studied here to find such luminous sources at such high redshifts. They extend evidence from lower redshifts for little or no evolution in the bright end of the UV luminosity function into the cosmic dawn epoch, with implications for just how early these galaxies began forming. This, in turn, suggests that future deep JWST observations may identify relatively bright galaxies to much earlier epochs than might have been anticipated. © 2022, CC BY.

关键词： Galaxies

来源：评论

学校读者我要写书评

暂无评论

How to Build the Virtual Cell with Artificial Intelligence: Priorities and Opportunities

arXiv

引用

arXiv 2024年

作者： Bunne, Charlotte Roohani, Yusuf Rosen, Yanay Gupta, Ankit Zhang, Xikun Roed, Marcel Alexandrov, Theo AlQuraishi, Mohammed Brennan, Patricia Burkhardt, Daniel B. Califano, Andrea Cool, Jonah Dernburg, Abby F. Ewing, Kirsty Fox, Emily B. Haury, Matthias Herr, Amy E. Horvitz, Eric Hsu, Patrick D. Jain, Viren Johnson, Gregory R. Kalil, Thomas Kelley, David R. Kelley, Shana O. Kreshuk, Anna Mitchison, Tim Otte, Stephani Shendure, Jay Sofroniew, Nicholas J. Theis, Fabian Theodoris, Christina V. Upadhyayula, Srigokul Valer, Marc Wang, Bo Xing, Eric Yeung-Levy, Serena Zitnik, Marinka Karaletsos, Theofanis Regev, Aviv Lundberg, Emma Leskovec, Jure Quake, Stephen R. Department of Computer Science Stanford University StanfordCA United States Genentech South San FranciscoCA United States Chan Zuckerberg Initiative Redwood CityCA United States School of Computer and Communication Sciences School of Life Sciences EPFL Lausanne Switzerland Arc Institute Palo AltoCA United States KTH Royal Institute of Technology Science for Life Laboratory Department of Protein Science Stockholm Sweden Department of Bioengineering Stanford University StanfordCA United States Department of Pharmacology University of California San DiegoCA United States Department of Bioengineering University of California San DiegoCA United States Department of Systems Biology Columbia University New YorkNY United States Cellarity SomervilleMA United States Vagelos College of Physicians and Surgeons Columbia University Irving Medical Center New YorkNY United States Chan Zuckerberg Biohub New YorkNY United States Department of Molecular and Cell Biology University of California Berkeley BerkeleyCA United States Department of Statistics Stanford University StanfordCA United States Chan Zuckerberg Biohub San Francisco CA United States Chan Zuckerberg Institute for Advanced Biological Imaging Redwood CityCA United States Department of Bioengineering University of California BerkeleyCA United States Microsoft Research RedmondWA United States Center for Computational Biology University of California Berkeley BerkeleyCA United States Google Research Mountain ViewCA United States NewLimit San FranciscoCA United States Schmidt city United States Calico Life Sciences LLC San FranciscoCA United States Chan Zuckerberg Biohub Chicago IL United States Northwestern University EvanstonIL United States Cell Biology and Biophysics Unit European Molecular Biology Laboratory Heidelberg Germany Department of Systems Biology Harvard Medical School BostonMA United States Department of Genome Sciences University of Washington SeattleWA Unit

The cell is arguably the most fundamental unit of life and is central to understanding biology. Accurate modeling of cells is important for this understanding as well as for determining the root causes of disease. Recent advances in artificial intelligence (AI), combined with the ability to generate large-scale experimental data, present novel opportunities to model cells. Here we propose a vision of leveraging advances in AI to construct virtual cells, high-fidelity simulations of cells and cellular systems under different conditions that are directly learned from biological data across measurements and scales. We discuss desired capabilities of such AI Virtual Cells, including generating universal representations of biological entities across scales, and facilitating interpretable in silico experiments to predict and understand their behavior using Virtual Instruments. We further address the challenges, opportunities and requirements to realize this vision including data needs, evaluation strategies, and community standards and engagement to ensure biological accuracy and broad utility. We envision a future where AI Virtual Cells help identify new drug targets, predict cellular responses to perturbations, as well as scale hypothesis exploration. With open science collaborations across the biomedical ecosystem that includes academia, philanthropy, and the biopharma and AI industries, a comprehensive predictive understanding of cell mechanisms and interactions has come into reach. © 2024, CC BY.

关键词： Virtual environments

来源：评论

学校读者我要写书评

暂无评论

HYBRID SATELLITE AND TERRESTRIAL NETWORKS

引用

INTERNATIONAL JOURNAL OF SATELLITE COMMUNICATIONS 1994年第3期12卷 313-327页

作者： CHITRE, DM SHYY, DJ EPHREMIDES, A GUPTA, S COMSAT Laboratories 22300 Comsat Drive Clarksburg MD 20871–9475 USA. Received his B.Sc. from the University of Bombay India an M.A. in mathematics from the University of Cambridge U.K. and a Ph.D. in physics from the University of Maryland. He is currently an Associate Executive Director of the Network Technology Division at COMSAT Laboratories. He has been involved in research and development activities in ISDN VSAT networks data communications and network systems and architectures. Prior to his current positions Dr. Chitre was a Principal Scientist in the Network Technology Division at COMSAT Laboratories. Dr. Chitre joined COMSAT Laboratories in 1980. He has made major contributions to the analysis and architecture of data communication ISDN and BISDN via satellite. Dr. Chitre directs and participates in the international and national standards activities in ISDN BISDN and data communication as they apply to satellite communication. He was Chairman of the Working Group on Protocols and Network Timing Function of the CCIR/CCITT Joint Ad Hoc Group on ISDN/Satellite Matters during 1990–1992. Currently he is the Chairman of the Working Group on New Technologies in the ITU Intersector Coordinating Group (ICG) on Satellite Matters. Dr. Chitre was a programme manager during 1990 and 1991 on a contract from INTELSAT on systems studies on satellite communications systems architectures for ISDN and broadband ISDN systems. Currently he is the technical manager of the DoD Contract on ATM via satellite demonstration and the programme manager for the INTELSAT contract on analysis and top-level specification of INTELSAT ISDN subnetworks and SDH compatible transport network. Received the B.S. degree in electrical engineering from national Chiao-Tung University Hsin-Chu Taiwan in 1983 and the M.S. and Ph.D. degrees in electrical engineering from Georgia Institute of Technology Atlanta GA in 1986 and 1990 respectively. From June 1987 to October 1987 he worked for the Department of Neurology Emory Univers

The role of satellite communications in networks that provide new services, such as frame relay and multimedia, is investigated. Both passive and active (on-board switching/processing) satellite systems are considered. Novel techniques are developed for each system to demonstrate, via detailed analysis and simulation, how the communications bandwidth agility of multipoint/broadcast satellite channels, and the on-board switching/processing, makes it feasible to provide these new services via hybrid satellite and terrestrial networks in a resource-efficient manner.

关键词： HYBRID NETWORKS ON-BOARD processing FRAME RELAY

来源：评论

学校读者我要写书评

暂无评论

An ALMA survey of submillimetre galaxies in the COSMOS field: The extent of the radio-emitting region revealed by 3 GHz imaging with the Very Large Array

arXiv

引用

arXiv 2017年

作者： Miettinen, O. Novak, M. Smolčić, V. Delvecchio, I. Aravena, M. Brisbin, D. Karim, A. Murphy, E.J. Schinnerer, E. Albrecht, M. Aussel, H. Bertoldi, F. Capak, P.L. Casey, C.M. Civano, F. Hayward, C.C. Ruiz, N. Herrera Ilbert, O. Jiang, C. Laigle, C. Le Fèvre, O. Magnelli, B. Marchesi, S. McCracken, H.J. Middelberg, E. Arancibia, A.M. Muñoz Navarrete, F. Padilla, N.D. Riechers, D.A. Salvato, M. Scott, K.S. Sheth, K. Tasca, L.A.M. Bondi, M. Zamorani, G. Department of Physics University of Zagreb Bijenička cesta 32 ZagrebHR-10000 Croatia Núcleo de Astronomía Facultad de Ingeniería Universidad Diego Portales Av. Ejército 441 Santiago Chile Argelander-Institut für Astronomie Universität Bonn Auf dem Hügel 71 BonnD-53121 Germany National Radio Astronomy Observatory 520 Edgemont Road CharlottesvilleVA22903 United States Max-Planck-Institut für Astronomie Königstuhl 17 Heidelberg69117 Germany AIM Unité Mixte de Recherche CEA CNRS Université Paris VII UMR n158 Paris France Infrared Processing and Analysis Center California Institute of Technology MC 100-22 770 South Wilson Ave. PasadenaCA91125 United States Spitzer Science Center California Institute of Technology PasadenaCA91125 United States Department of Astronomy University of Texas at Austin 2515 Speedway Blvd Stop C1400 AustinTX78712 United States Yale Center for Astronomy and Astrophysics 260 Whitney Avenue New HavenCT06520 United States Harvard-Smithsonian Center for Astrophysics 60 Garden Street CambridgeMA02138 United States Center for Computational Astrophysics Flatiron Institute 162 Fifth Avenue New YorkNY10010 Astronomisches Institut Ruhr-Universität Bochum Universitätstrasse 150 Bochum44801 Germany UMR 7326 Marseille13388 France CAS Key Laboratory for Research in Galaxies and Cosmology Shanghai Astronomical Observatory Nandan Road 80 Shanghai200030 China Chinese Academy of Sciences South America Center for Astronomy Santiago7591245 Chile Sorbonne Universités UPMC Université Paris 6 et CNRS UMR 7095 Institut d’Astrophysique de Paris 98 bis Boulevard Arago Paris75014 France Dipartimento di Fisica e Astronomia Università di Bologna viale Berti Pichat 6/2 Bologna40127 Italy Instituto de Física y Astronomía Universidad de Valparaíso Av. Gran Bretaña 1111 Valparaíso Chile Instituto de Astrofísica Pontificia Universidad Católica de Chile Avda. Vicuña Mackenna 4860 Santiago Chile Centro de Astro-Ingeniería Pontifici

Context. The observed spatial scale of the radio continuum emission from star-forming galaxies can be used to investigate the spatial extent of active star formation, constrain the importance of cosmic-ray transport, and examine the effects of galaxy interactions. Aims. We determine the radio size distribution of a large sample of 152 submillimetre galaxies (SMGs) in the COSMOS field that were pre-selected at 1.1 mm, and later detected with the Atacama Large Millimetre/submillimetre Array (ALMA) in the observed-frame 1.3 mm dust continuum emission at a signal-to-noise (S/N) ratio of ≥ 5. Methods. We used the deep, subarcsecond-resolution (1σ = 2.3 µJy beam−1;0′′ . 75) centimetre radio continuum observations taken by the Karl G. Jansky Very Large Array (VLA)-COSMOS 3 GHz Large Project. Results. One hundred and fifteen of the 152 target SMGs (76% ± 7%) were found to have a 3 GHz counterpart (≥ 4.2σ), which renders the radio detection rate notably high. The median value of the deconvolved major axis full width at half maximum (FWHM) size at 3 GHz is derived to be 0′′ . 59 ± 0′′ . 05, or 4.6 ± 0.4 kpc in physical units, where the median redshift of the sources is z = 2.23 ± 0.13 (23% are spectroscopic and 77% are photometric values). The radio sizes are roughly log-normally distributed, and they show no evolutionary trend with redshift, or difference between different galaxy morphologies. We also derived the spectral indices between 1.4 and 3 GHz, and 3 GHz brightness temperatures for the sources, and the median values were found to be α***4 GHz = −0.67 (S ν ∝ να ) and TB = 12.6 ± 2 K. Three of the target SMGs, which are also detected with the Very Long Baseline Array (VLBA) at 1.4 GHz (AzTEC/C24b, 61, and 77a), show clearly higher brightness temperatures than the typical values, reaching TB (3 GHz) > 104.03 K for AzTEC/C61. Conclusions. The derived median radio spectral index agrees with a value expected for optically thin non-thermal synchrotron radiation, and the

关键词： Normal distribution

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：