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12th International Probabilistic Safety Assessment and Management Conference, PSAM 2014

作者： Montewka, Jakub Goerlandt, Floris Innes-Jones, Gemma Owen, douglas Hifi, Yasmine Porthin, Markus Aalto University Department of Applied Mechanics Marine Technology Research Group on Maritime Risk and Safety Espoo Finland EMEA Bristol United Kingdom Brookes Bell R and D Glasgow United Kingdom VTT Technical Research Centre of Finland Espoo Finland

risk-based design (rBd) methodology for ships is a relatively new and a fast developing discipline. However, quantification of human error contribution to the risk of collision or grounding within rBd has not been considered before. This paper introduces probabilistic models linking the effect of ship motion, vibration and noise with risk through the mediating agent of a crewmember. The models utilize the concept of Attention Management, which combines the theories described by dynamic Adaptability Model, Cognitive Control Model and Malleable Attentional resources Theory. To model the risk, an uncertainty-based approach is taken, under which the available background knowledge is systematically translated into a coherent network and the evidential uncertainty is qualitatively assessed. The obtained results are promising as the models are responsive to changes in the GdF nodes as expected. The models may be used as intended by naval architects and vessel designers, to facilitate risk-based ship design.

关键词： Bayesian networks

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A European Multi Lake Survey dataset of environmental variables, phytoplankton pigments and cyanotoxins

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Scientific data 2018年第1期5卷 180226页

作者： Mantzouki, Evanthia Campbell, James Loon, Emiel Van Visser, Petra Konstantinou, Iosif Antoniou, Maria Giuliani, Grégory Machado-Vieira, danielle Oliveira, Alinne Gurjão de Maronić, dubravka Špoljarić Stević, Filip Pfeiffer, Tanja Žuna Vucelić, Itana Bokan Žutinić, Petar Udovič, Marija Gligora Plenković-Moraj, Anđelka Tsiarta, Nikoletta Bláha, Luděk Geriš, rodan Fránková, Markéta Christoffersen, Kirsten Seestern Warming, Trine Perlt Feldmann, Tõnu Laas, Alo Panksep, Kristel Tuvikene, Lea Kangro, Kersti Häggqvist, Kerstin Salmi, Pauliina Arvola, Lauri Fastner, Jutta Straile, dietmar rothhaupt, Karl-Otto Fonvielle, Jeremy Grossart, Hans-Peter Avagianos, Christos Kaloudis, Triantafyllos Triantis, Theodoros Zervou, Sevasti-Kiriaki Hiskia, Anastasia Gkelis, Spyros Panou, Manthos McCarthy, Valerie Perello, Victor C. Obertegger, Ulrike Boscaini, Adriano Flaim, Giovanna Salmaso, Nico Cerasino, Leonardo Koreivienė, Judita Karosienė, Jūratė Kasperovičienė, Jūratė Savadova, Ksenija Vitonytė, Irma Haande, Sigrid Skjelbred, Birger Grabowska, Magdalena Karpowicz, Maciej Chmura, damian Nawrocka, Lidia Kobos, Justyna Mazur-Marzec, Hanna Alcaraz-Párraga, Pablo Wilk-Woźniak, Elżbieta Krztoń, Wojciech Walusiak, Edward Gagala, Ilona Mankiewicz-Boczek, Joana Toporowska, Magdalena Pawlik-Skowronska, Barbara Niedźwieck, Michał Pęczuła, Wojciech Napiórkowska-Krzebietke, Agnieszka dunalska, Julita Sieńska, Justyna Szymański, daniel Kruk, Marek Budzyńska, Agnieszka Goldyn, ryszard Kozak, Anna rosińska, Joanna Szeląg-Wasielewska, Elżbieta domek, Piotr Jakubowska-Krepska, Natalia Kwasizur, Kinga Messyasz, Beata Pełechata, Aleksandra Pełechaty, Mariusz Kokocinski, Mikolaj Madrecka, Beata Kostrzewska-Szlakowska, Iwona Frąk, Magdalena Bańkowska-Sobczak, Agnieszka Wasilewicz, Michał Ochocka, Agnieszka Pasztalenie, Agnieszka Jasser, Iwona Antão-Geraldes, Ana M. Leira, Manel Hernández, Armand Vasconcelos, Vitor Morais, João Vale, Micaela raposeiro, Pedro M. Gonçalves, Vítor Aleksovski, Boris Krstić, Svetislav Nemova, Hana drastichova, Iveta Chomov Department F.-A. Forel for Environmental and Aquatic Sciences University of Geneva Geneva 1205 Switzerland Institute of Biology Leiden University Leiden 2333 BE Netherlands Department of Freshwater and Marine Ecology University of Amsterdam Amsterdam 1090 GE Netherlands Department of Environmental Science and Technology Cyprus University of Technology Lemesos 3036 Cyprus Institute for Environmental Sciences GRID University of Geneva Geneva 1211 Switzerland Departamento de Sistemática e Ecologia Universidade Federal da Paraíba 58059-970 Paraíba Brazil Department of Biology Josip Juraj Strossmayer University of Osijek Osijek 31000 Croatia Department for Ecotoxicology Teaching Institute of Public Health of Primorje-Gorski Kotar County Rijeka 51000 Croatia Department of Biology Faculty of Science University of Zagreb Zagreb 10000 Croatia RECETOX Faculty of Science Masaryk University Brno 62500 Czech Republic Department of Hydrobiology Morava Board Authority Brno 60200 Czech Republic Laboratory of Paleoecology Institute of Botany The Czech Academy of Sciences Brno 60200 Czech Republic Freshwater Biological Laboratory Department of Biology University of Copenhagen Copenhagen 2100 Denmark Institute of Agricultural and Environmental Sciences Estonian University of Life Sciences Tartu 51014 Estonia Tartu Observatory Faculty of Science and Technology University of Tartu Tartu 61602 Estonia Department of Science and Engineering Åbo Akademi University Åbo 20520 Finland Department of Biological and Environmental Science University of Jyväskylä Jyväskylä 40014 Finland Lammi Biological Station University of Helsinki Lammi 16900 Finland German Environment Agency Unit Drinking Water Resources and Water Treatment Corrensplatz 1 Berlin 14195 Germany Department of Biology Limnological Institute University of Konstanz Konstanz 78464 Germany Department of Experimental Limnology Leibniz Institute of Freshwater Ecology and Inland Fisheries Stechlin

Under ongoing climate change and increasing anthropogenic activity, which continuously challenge ecosystem resilience, an in-depth understanding of ecological processes is urgently needed. Lakes, as providers of numerous ecosystem services, face multiple stressors that threaten their functioning. Harmful cyanobacterial blooms are a persistent problem resulting from nutrient pollution and climate-change induced stressors, like poor transparency, increased water temperature and enhanced stratification. Consistency in data collection and analysis methods is necessary to achieve fully comparable datasets and for statistical validity, avoiding issues linked to disparate data sources. The European Multi Lake Survey (EMLS) in summer 2015 was an initiative among scientists from 27 countries to collect and analyse lake physical, chemical and biological variables in a fully standardized manner. This database includes in-situ lake variables along with nutrient, pigment and cyanotoxin data of 369 lakes in Europe, which were centrally analysed in dedicated laboratories. Publishing the EMLS methods and dataset might inspire similar initiatives to study across large geographic areas that will contribute to better understanding lake responses in a changing environment. © The Author(s) 2018.

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Experimental determination of the solubility of Co in the Cr-based carbides Cr23C6, Cr7C3, and Cr 3C2

Experimental determination of the solubility of Co in the Cr...

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作者： Kaplan, Bartek Markström, Andreas Norgren, Susanne Selleby, Malin Department of Materials Science and Engineering KTH Royal Institute of Technology Stockholm Sweden Sandvik Coromant R and D Stockholm Sweden Thermo-Calc Software AB Stockholm Sweden Ångström Tribomaterials Group Applied Materials Science Uppsala University Uppsala Sweden

Thermodynamic calculations based on the CALPHAd method are nowadays often applied in the design of new materials due to increasing demands on shorter lead times for development. However, such calculations rely heavily on the assessed thermodynamic descriptions, which in turn rely on the amount and quality of available experimental data, especially for binary and ternary sub-systems. The ternary Co-Cr-C system is an extremely important subsystem to, e.g., multi-component cemented carbide grades, such as W-Co-Cr-M-C (M = Ti,Ta,Nb,V,Zr,Hf), as well as Cr-containing Co-base alloys. In the case of the Co-Cr-C system, there is a lack of reliable data on the solubility of Co in Cr-carbides. Therefore, the present work concerns an experimental study of the solubility of Co in all three of the Cr-based carbides, i.e., Cr 23C6, Cr7C3, and Cr 3C2. This was done by synthesizing appropriate samples in the M7C3+M23C6+liquid and M 7C3+M3C2+graphite three-phase fields. The results show that a recent thermodynamic description of the Co-Cr-C system is unable to reproduce the experimentally determined solubilities. Therefore, the present study provides important input for future alloy development and improvement of the thermodynamic description of the Co-Cr-C system. © 2014 The Minerals, Metals & Materials Society and ASM International.

关键词： Carbides

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Implant Materials: Assessment of Novel Long‐Lasting Ceria‐Stabilized Zirconia‐Based Ceramics with different Surface Topographies as Implant Materials (Adv. Funct. Mater. 40/2017)

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Advanced Functional Materials 2017年第40期27卷

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Search for high-energy neutrinos from gravitational wave event GW151226 and candidate LVT151012 with ANTArES and IceCube

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Physical review d 2017年第2期96卷 022005-022005页

作者： A. Albert M. André M. Anghinolfi G. Anton M. Ardid J.-J. Aubert T. Avgitas B. Baret J. Barrios-Martí S. Basa V. Bertin S. Biagi r. Bormuth S. Bourret M. C. Bouwhuis r. Bruijn J. Brunner J. Busto A. Capone L. Caramete J. Carr S. Celli T. Chiarusi M. Circella J. A. B. Coelho A. Coleiro r. Coniglione H. Costantini P. Coyle A. Creusot A. deschamps G. de Bonis C. distefano I. di Palma C. donzaud d. dornic d. drouhin T. Eberl I. El Bojaddaini d. Elsässer A. Enzenhöfer I. Felis L. A. Fusco S. Galatà P. Gay V. Giordano H. Glotin T. Grégoire r. Gracia ruiz K. Graf S. Hallmann H. van Haren A. J. Heijboer Y. Hello J. J. Hernández-rey J. Hößl J. Hofestädt C. Hugon G. Illuminati C. W. James M. de Jong M. Jongen M. Kadler O. Kalekin U. Katz d. Kießling A. Kouchner M. Kreter I. Kreykenbohm V. Kulikovskiy C. Lachaud r. Lahmann d. Lefèvre E. Leonora M. Lotze S. Loucatos M. Marcelin A. Margiotta A. Marinelli J. A. Martínez-Mora A. Mathieu r. Mele K. Melis T. Michael P. Migliozzi A. Moussa E. Nezri G. E. Păvălaş C. Pellegrino C. Perrina P. Piattelli V. Popa T. Pradier L. Quinn C. racca G. riccobene A. Sánchez-Losa M. Saldaña I. Salvadori d. F. E. Samtleben M. Sanguineti P. Sapienza F. Schüssler C. Sieger M. Spurio Th. Stolarczyk M. Taiuti Y. Tayalati A. Trovato d. Turpin C. Tönnis B. Vallage C. Vallée V. Van Elewyck F. Versari d. Vivolo A. Vizzoca J. Wilms J. d. Zornoza J. Zúñiga M. G. Aartsen M. Ackermann J. Adams J. A. Aguilar M. Ahlers M. Ahrens I. Al Samarai d. Altmann K. Andeen T. Anderson I. Ansseau M. Archinger C. Argüelles J. Auffenberg S. Axani H. Bagherpour X. Bai S. W. Barwick V. Baum r. Bay J. J. Beatty J. Becker Tjus K.-H. Becker S. BenZvi d. Berley E. Bernardini d. Z. Besson G. Binder d. Bindig E. Blaufuss S. Blot C. Bohm M. Börner F. Bos d. Bose S. Böser O. Botner F. Bradascio J. Braun L. Brayeur H.-P. Bretz S. Bron A. Burgman T. Carver M. Casier E. Cheung d. Chirkin A. Christov K. Clark L. Classen S. Coenders G. H. Collin J. M. Conrad d. F. Cowen r. Cross M. day J. P. A. M. de André C. de Clercq E. del Pino rosendo GRPHE Institut universitaire de technologie de Colmar Université de Haute Alsace 34 rue du Grillenbreit BP 50568 68008 Colmar France Laboratory of Applied Bioacoustics Technical University of Catalonia Rambla Exposició 08800 Vilanova i la Geltrú Barcelona Spain INFN Sezione di Genova Via Dodecaneso 33 16146 Genova Italy Erlangen Centre for Astroparticle Physics Friedrich-Alexander-Universität Erlangen–Nürnberg Erwin-Rommel-Str. 1 91058 Erlangen Germany Institut d’Investigació per a la Gestió Integrada de les Zones Costaneres (IGIC) Universitat Politècnica de València c/ Paranimf 1 46730 Gandia Spain Aix Marseille Université CNRS/IN2P3 CPPM Marseille France AstroParticule et Cosmologie (APC) Université Paris Diderot CNRS/IN2P3 CEA/Irfu Observatoire de Paris Sorbonne Paris Cité F-75205 Paris Cedex 13 France Instituto de Física Corpuscular (IFIC) CSIC Universitat de València c/ Catedrático José Beltrán 2 E-46980 Paterna Valencia Spain Laboratoire d’Astrophysique de Marseille (LAM) Pôle de l’Étoile Site de Château-Gombert rue Frédéric Joliot-Curie 38 13388 Marseille Cedex 13 France INFN Laboratori Nazionali del Sud (LNS) Via S. Sofia 62 95123 Catania Italy Nikhef Science Park Amsterdam The Netherlands Huygens-Kamerlingh Onnes Laboratorium Universiteit Leiden The Netherlands Universiteit van Amsterdam Instituut voor Hoge-Energie Fysica Science Park 105 1098 XG Amsterdam The Netherlands INFN Sezione di Roma P.le Aldo Moro 2 00185 Roma Italy Dipartimento di Fisica dell’Università La Sapienza P.le Aldo Moro 2 00185 Roma Italy Institute for Space Science RO-077125 Bucharest Măgurele Romania Gran Sasso Science Institute Viale Francesco Crispi 7 00167 L’Aquila Italy INFN Sezione di Bologna Viale Berti-Pichat 6/2 40127 Bologna Italy INFN Sezione di Bari Via E. Orabona 4 70126 Bari Italy Géoazur UCA CNRS IRD Observatoire de la Côte d’Azur Sophia Antipolis France Albert-Einstein-Institut Max-Planck-Institut für Gravitationsphysik D-14476 Potsd

The Advanced LIGO observatories detected gravitational waves from two binary black hole mergers during their first observation run (O1). We present a high-energy neutrino follow-up search for the second gravitational wave event, GW151226, as well as for gravitational wave candidate LVT151012. We find two and four neutrino candidates detected by IceCube, and one and zero detected by Antares, within ±500 s around the respective gravitational wave signals, consistent with the expected background rate. None of these neutrino candidates are found to be directionally coincident with GW151226 or LVT151012. We use nondetection to constrain isotropic-equivalent high-energy neutrino emission from GW151226, adopting the GW event’s 3d localization, to less than 2×1051–2×1054 erg.

关键词： Extrasolar neutrino astronomy Gravitational waves Classical black holes

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GW170104: Observation of a 50-Solar-Mass Binary Black Hole Coalescence at redshift 0.2

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Physical review Letters 2017年第22期118卷 221101-221101页

作者： B. P. Abbott r. Abbott T. d. Abbott F. Acernese K. Ackley C. Adams T. Adams P. Addesso r. X. Adhikari V. B. Adya C. Affeldt M. Afrough B. Agarwal M. Agathos K. Agatsuma N. Aggarwal O. d. Aguiar L. Aiello A. Ain P. Ajith B. Allen G. Allen A. Allocca P. A. Altin A. Amato A. Ananyeva S. B. Anderson W. G. Anderson S. Antier S. Appert K. Arai M. C. Araya J. S. Areeda N. Arnaud K. G. Arun S. Ascenzi G. Ashton M. Ast S. M. Aston P. Astone P. Aufmuth C. Aulbert K. AultONeal A. Avila-Alvarez S. Babak P. Bacon M. K. M. Bader S. Bae P. T. Baker F. Baldaccini G. Ballardin S. W. Ballmer S. Banagiri J. C. Barayoga S. E. Barclay B. C. Barish d. Barker F. Barone B. Barr L. Barsotti M. Barsuglia d. Barta J. Bartlett I. Bartos r. Bassiri A. Basti J. C. Batch C. Baune M. Bawaj M. Bazzan B. Bécsy C. Beer M. Bejger I. Belahcene A. S. Bell B. K. Berger G. Bergmann C. P. L. Berry d. Bersanetti A. Bertolini J. Betzwieser S. Bhagwat r. Bhandare I. A. Bilenko G. Billingsley C. r. Billman J. Birch r. Birney O. Birnholtz S. Biscans A. Bisht M. Bitossi C. Biwer M. A. Bizouard J. K. Blackburn J. Blackman C. d. Blair d. G. Blair r. M. Blair S. Bloemen O. Bock N. Bode M. Boer G. Bogaert A. Bohe F. Bondu r. Bonnand B. A. Boom r. Bork V. Boschi S. Bose Y. Bouffanais A. Bozzi C. Bradaschia P. r. Brady V. B. Braginsky M. Branchesi J. E. Brau T. Briant A. Brillet M. Brinkmann V. Brisson P. Brockill J. E. Broida A. F. Brooks d. A. Brown d. d. Brown N. M. Brown S. Brunett C. C. Buchanan A. Buikema T. Bulik H. J. Bulten A. Buonanno d. Buskulic C. Buy r. L. Byer M. Cabero L. Cadonati G. Cagnoli C. Cahillane J. Calderón Bustillo T. A. Callister E. Calloni J. B. Camp M. Canepa P. Canizares K. C. Cannon H. Cao J. Cao C. d. Capano E. Capocasa F. Carbognani S. Caride M. F. Carney J. Casanueva diaz C. Casentini S. Caudill M. Cavaglià F. Cavalier r. Cavalieri G. Cella C. B. Cepeda L. Cerboni Baiardi G. Cerretani E. Cesarini S. J. Chamberlin M. Chan S. Chao P. Charlton E. Chassande-Mottin d. Chatterjee K. Chatziioannou B. d. Cheeseboro H. Y. Chen Y. Chen H.-P. LIGO California Institute of Technology Pasadena California 91125 USA Louisiana State University Baton Rouge Louisiana 70803 USA Università di Salerno Fisciano I-84084 Salerno Italy INFN Sezione di Napoli Complesso Universitario di Monte S. Angelo I-80126 Napoli Italy University of Florida Gainesville Florida 32611 USA LIGO Livingston Observatory Livingston Louisiana 70754 USA Laboratoire d’Annecy-le-Vieux de Physique des Particules (LAPP) Université Savoie Mont Blanc CNRS/IN2P3 F-74941 Annecy France University of Sannio at Benevento I-82100 Benevento Italy and INFN Sezione di Napoli I-80100 Napoli Italy Albert-Einstein-Institut Max-Planck-Institut für Gravitationsphysik D-30167 Hannover Germany The University of Mississippi University Mississippi 38677 USA NCSA University of Illinois at Urbana-Champaign Urbana IL 61801 USA University of Cambridge Cambridge CB2 1TN United Kingdom Nikhef Science Park 1098 XG Amsterdam Netherlands LIGO Massachusetts Institute of Technology Cambridge Massachusetts 02139 USA Instituto Nacional de Pesquisas Espaciais 12227-010 São José dos Campos São Paulo Brazil Gran Sasso Science Institute (GSSI) I-67100 L’Aquila Italy INFN Sezione di Roma Tor Vergata I-00133 Roma Italy Inter-University Centre for Astronomy and Astrophysics Pune 411007 India International Centre for Theoretical Sciences Tata Institute of Fundamental Research Bengaluru 560089 India University of Wisconsin-Milwaukee Milwaukee Wisconsin 53201 USA Leibniz Universität Hannover D-30167 Hannover Germany Università di Pisa I-56127 Pisa Italy INFN Sezione di Pisa I-56127 Pisa Italy OzGrav Australian National University Canberra Australian Capital Territory 0200 Australia Laboratoire des Matériaux Avancés (LMA) CNRS/IN2P3 F-69622 Villeurbanne France LAL Univ. Paris-Sud CNRS/IN2P3 Université Paris-Saclay F-91898 Orsay France California State University Fullerton Fullerton California 92831 USA European Gravitational Observatory (EGO) I-56021

We describe the observation of GW170104, a gravitational-wave signal produced by the coalescence of a pair of stellar-mass black holes. The signal was measured on January 4, 2017 at 10∶11:58.6 UTC by the twin advanced detectors of the Laser Interferometer Gravitational-Wave Observatory during their second observing run, with a network signal-to-noise ratio of 13 and a false alarm rate less than 1 in 70 000 years. The inferred component black hole masses are 31.2−6.0+8.4M⊙ and 19.4−5.9+5.3M⊙ (at the 90% credible level). The black hole spins are best constrained through measurement of the effective inspiral spin parameter, a mass-weighted combination of the spin components perpendicular to the orbital plane, χeff=−0.12−0.30+0.21. This result implies that spin configurations with both component spins positively aligned with the orbital angular momentum are disfavored. The source luminosity distance is 880−390+450 Mpc corresponding to a redshift of z=0.18−0.07+0.08. We constrain the magnitude of modifications to the gravitational-wave dispersion relation and perform null tests of general relativity. Assuming that gravitons are dispersed in vacuum like massive particles, we bound the graviton mass to mg≤7.7×10−23 eV/c2. In all cases, we find that GW170104 is consistent with general relativity.

关键词： General relativity Gravitational waves Binary stars Classical black holes Gravitational wave detection Gravitational wave detectors Numerical relativity

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Upper Limits on the Stochastic Gravitational-Wave Background from Advanced LIGO’s First Observing run

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Physical review Letters 2017年第12期118卷 121101-121101页

作者： B. P. Abbott r. Abbott T. d. Abbott M. r. Abernathy F. Acernese K. Ackley C. Adams T. Adams P. Addesso r. X. Adhikari V. B. Adya C. Affeldt M. Agathos K. Agatsuma N. Aggarwal O. d. Aguiar L. Aiello A. Ain P. Ajith B. Allen A. Allocca P. A. Altin A. Ananyeva S. B. Anderson W. G. Anderson S. Appert K. Arai M. C. Araya J. S. Areeda N. Arnaud K. G. Arun S. Ascenzi G. Ashton M. Ast S. M. Aston P. Astone P. Aufmuth C. Aulbert A. Avila-Alvarez S. Babak P. Bacon M. K. M. Bader P. T. Baker F. Baldaccini G. Ballardin S. W. Ballmer J. C. Barayoga S. E. Barclay B. C. Barish d. Barker F. Barone B. Barr L. Barsotti M. Barsuglia d. Barta J. Bartlett I. Bartos r. Bassiri A. Basti J. C. Batch C. Baune V. Bavigadda M. Bazzan C. Beer M. Bejger I. Belahcene M. Belgin A. S. Bell B. K. Berger G. Bergmann C. P. L. Berry d. Bersanetti A. Bertolini J. Betzwieser S. Bhagwat r. Bhandare I. A. Bilenko G. Billingsley C. r. Billman J. Birch r. Birney O. Birnholtz S. Biscans A. S. Biscoveanu A. Bisht M. Bitossi C. Biwer M. A. Bizouard J. K. Blackburn J. Blackman C. d. Blair d. G. Blair r. M. Blair S. Bloemen O. Bock M. Boer G. Bogaert A. Bohe F. Bondu r. Bonnand B. A. Boom r. Bork V. Boschi S. Bose Y. Bouffanais A. Bozzi C. Bradaschia P. r. Brady V. B. Braginsky M. Branchesi J. E. Brau T. Briant A. Brillet M. Brinkmann V. Brisson P. Brockill J. E. Broida A. F. Brooks d. A. Brown d. d. Brown N. M. Brown S. Brunett C. C. Buchanan A. Buikema T. Bulik H. J. Bulten A. Buonanno d. Buskulic C. Buy r. L. Byer M. Cabero L. Cadonati G. Cagnoli C. Cahillane J. Calderón Bustillo T. A. Callister E. Calloni J. B. Camp W. Campbell M. Canepa K. C. Cannon H. Cao J. Cao C. d. Capano E. Capocasa F. Carbognani S. Caride J. Casanueva diaz C. Casentini S. Caudill M. Cavaglià F. Cavalier r. Cavalieri G. Cella C. B. Cepeda L. Cerboni Baiardi G. Cerretani E. Cesarini S. J. Chamberlin M. Chan S. Chao P. Charlton E. Chassande-Mottin B. d. Cheeseboro H. Y. Chen Y. Chen H.-P. Cheng A. Chincarini A. Chiummo T. Chmiel H. S. Cho M. Cho J. H. Chow N. Christensen Q. Chu A. J. LIGO California Institute of Technology Pasadena California 91125 USA Louisiana State University Baton Rouge Louisiana 70803 USA American University Washington D.C. 20016 USA Università di Salerno Fisciano I-84084 Salerno Italy INFN Sezione di Napoli Complesso Universitario di Monte S.Angelo I-80126 Napoli Italy University of Florida Gainesville Florida 32611 USA LIGO Livingston Observatory Livingston Louisiana 70754 USA Laboratoire d’Annecy-le-Vieux de Physique des Particules (LAPP) Université Savoie Mont Blanc CNRS/IN2P3 F-74941 Annecy-le-Vieux France University of Sannio at Benevento I-82100 Benevento Italy and INFN Sezione di Napoli I-80100 Napoli Italy Albert-Einstein-Institut Max-Planck-Institut für Gravitationsphysik D-30167 Hannover Germany Nikhef Science Park 1098 XG Amsterdam The Netherlands LIGO Massachusetts Institute of Technology Cambridge Massachusetts 02139 USA Instituto Nacional de Pesquisas Espaciais 12227-010 São José dos Campos São Paulo Brazil INFN Gran Sasso Science Institute I-67100 L’Aquila Italy INFN Sezione di Roma Tor Vergata I-00133 Roma Italy Inter-University Centre for Astronomy and Astrophysics Pune 411007 India International Centre for Theoretical Sciences Tata Institute of Fundamental Research Bengaluru 560089 India University of Wisconsin-Milwaukee Milwaukee Wisconsin 53201 USA Leibniz Universität Hannover D-30167 Hannover Germany Università di Pisa I-56127 Pisa Italy INFN Sezione di Pisa I-56127 Pisa Italy Australian National University Canberra Australian Capital Territory 0200 Australia California State University Fullerton Fullerton California 92831 USA LAL Univ. Paris-Sud CNRS/IN2P3 Université Paris-Saclay F-91898 Orsay France Chennai Mathematical Institute Chennai 603103 India Università di Roma Tor Vergata I-00133 Roma Italy Universität Hamburg D-22761 Hamburg Germany INFN Sezione di Roma I-00185 Roma Italy Albert-Einstein-Institut Max-Planck-Institut für Gravitationsphysik D-14476 Pots

A wide variety of astrophysical and cosmological sources are expected to contribute to a stochastic gravitational-wave background. Following the observations of GW150914 and GW151226, the rate and mass of coalescing binary black holes appear to be greater than many previous expectations. As a result, the stochastic background from unresolved compact binary coalescences is expected to be particularly loud. We perform a search for the isotropic stochastic gravitational-wave background using data from Advanced Laser Interferometer Gravitational Wave Observatory’s (aLIGO) first observing run. The data display no evidence of a stochastic gravitational-wave signal. We constrain the dimensionless energy density of gravitational waves to be Ω0<1.7×10−7 with 95% confidence, assuming a flat energy density spectrum in the most sensitive part of the LIGO band (20–86 Hz). This is a factor of ∼33 times more sensitive than previous measurements. We also constrain arbitrary power-law spectra. Finally, we investigate the implications of this search for the background of binary black holes using an astrophysical model for the background.

关键词： Experimental studies of gravity General relativity Gravitational waves

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directional Limits on Persistent Gravitational Waves from Advanced LIGO’s First Observing run

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Physical review Letters 2017年第12期118卷 121102-121102页

We employ gravitational-wave radiometry to map the stochastic gravitational wave background expected from a variety of contributing mechanisms and test the assumption of isotropy using data from the Advanced Laser Interferometer Gravitational Wave Observatory’s (aLIGO) first observing run. We also search for persistent gravitational waves from point sources with only minimal assumptions over the 20–1726 Hz frequency band. Finding no evidence of gravitational waves from either point sources or a stochastic background, we set limits at 90% confidence. For broadband point sources, we report upper limits on the gravitational wave energy flux per unit frequency in the range Fα,Θ(f)<(0.1–56)×10−8 erg cm−2 s−1 Hz−1(f/25 Hz)α−1 depending on the sky location Θ and the spectral power index α. For extended sources, we report upper limits on the fractional gravitational wave energy density required to close the Universe of Ω(f,Θ)<(0.39–7.6)×10−8 sr−1(f/25 Hz)α depending on Θ and α. directed searches for narrowband gravitational waves from astrophysically interesting objects (Scorpius X-1, Supernova 1987 A, and the Galactic Center) yield median frequency-dependent limits on strain amplitude of h0<(6.7,5.5, and 7.0)×10−25, respectively, at the most sensitive detector frequencies between 130–175 Hz. This represents a mean improvement of a factor of 2 across the band compared to previous searches of this kind for these sky locations, considering the different quantities of strain constrained in each case.

关键词： Experimental studies of gravity General relativity Gravitational waves

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Erratum to: Measurement of the W boson polarisation in [Formula: see text] events from pp collisions at [Formula: see text] in the lepton + jets channel with ATLAS

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The European physical journal. C, Particles and fields 2019年第1期79卷 19页

作者： M Aaboud G Aad B Abbott J Abdallah O Abdinov B Abeloos O S AbouZeid N L Abraham H Abramowicz H Abreu r Abreu Y Abulaiti B S Acharya S Adachi L Adamczyk d L Adams J Adelman S Adomeit T Adye A A Affolder T Agatonovic-Jovin J A Aguilar-Saavedra S P Ahlen F Ahmadov G Aielli H Akerstedt T P A Åkesson A V Akimov G L Alberghi J Albert S Albrand M J Alconada Verzini M Aleksa I N Aleksandrov C Alexa G Alexander T Alexopoulos M Alhroob B Ali M Aliev G Alimonti J Alison S P Alkire B M M Allbrooke B W Allen P P Allport A Aloisio A Alonso F Alonso C Alpigiani A A Alshehri M Alstaty B Alvarez Gonzalez d Álvarez Piqueras M G Alviggi B T Amadio Y Amaral Coutinho C Amelung d Amidei S P Amor dos Santos A Amorim S Amoroso G Amundsen C Anastopoulos L S Ancu N Andari T Andeen C F Anders J K Anders K J Anderson A Andreazza V Andrei S Angelidakis I Angelozzi A Angerami F Anghinolfi A V Anisenkov N Anjos A Annovi C Antel M Antonelli A Antonov d J Antrim F Anulli M Aoki L Aperio Bella G Arabidze Y Arai J P Araque V Araujo Ferraz A T H Arce F A Arduh J-F Arguin S Argyropoulos M Arik A J Armbruster L J Armitage O Arnaez H Arnold M Arratia O Arslan A Artamonov G Artoni S Artz S Asai N Asbah A Ashkenazi B Åsman L Asquith K Assamagan r Astalos M Atkinson N B Atlay K Augsten G Avolio B Axen M K Ayoub G Azuelos M A Baak A E Baas M J Baca H Bachacou K Bachas M Backes M Backhaus P Bagiacchi P Bagnaia Y Bai J T Baines M Bajic O K Baker E M Baldin P Balek T Balestri F Balli W K Balunas E Banas Sw Banerjee A A E Bannoura L Barak E L Barberio d Barberis M Barbero T Barillari M-S Barisits T Barklow N Barlow S L Barnes B M Barnett r M Barnett Z Barnovska-Blenessy A Baroncelli G Barone A J Barr L Barranco Navarro F Barreiro J Barreiro Guimarães da Costa r Bartoldus A E Barton P Bartos A Basalaev A Bassalat r L Bates S J Batista J r Batley M Battaglia M Bauce F Bauer H S Bawa J B Beacham M d Beattie T Beau P H Beauchemin P Bechtle H P Beck K Becker M Becker M Beckingham C Becot A J Beddall A Beddall V A Bednyakov M Bedognetti C P Bee L J Beemster T A Bee 180Faculté des Sciences Université Mohamed Premier and LPTPM Oujda Morocco. 115CPPM Aix-Marseille Université and CNRS/IN2P3 Marseille France. 144Homer L. Dodge Department of Physics and Astronomy University of Oklahoma Norman OK USA. 10Department of Physics The University of Texas at Arlington Arlington TX USA. Institute of Physics Azerbaijan Academy of Sciences Baku Azerbaijan. 148LAL Univ. Paris-Sud CNRS/IN2P3 Université Paris-Saclay Orsay France. 183Santa Cruz Institute for Particle Physics University of California Santa Cruz Santa Cruz CA USA. 199Department of Physics and Astronomy University of Sussex Brighton UK. 203Raymond and Beverly Sackler School of Physics and Astronomy Tel Aviv University Tel Aviv Israel. 202Department of Physics Technion: Israel Institute of Technology Haifa Israel. 147Center for High Energy Physics University of Oregon Eugene OR USA. 195Department of Physics Stockholm University Stockholm Sweden. 196The Oskar Klein Centre Stockholm Sweden. 217INFN Gruppo Collegato di Udine Sezione di Trieste Udine Italy. 218ICTP Trieste Italy. 205International Center for Elementary Particle Physics and Department of Physics The University of Tokyo Tokyo Japan. 60Faculty of Physics and Applied Computer Science AGH University of Science and Technology Kraków Poland. 36Physics Department Brookhaven National Laboratory Upton NY USA. 139Department of Physics Northern Illinois University DeKalb IL USA. 130Fakultät für Physik Ludwig-Maximilians-Universität München Munich Germany. 170Particle Physics Department Rutherford Appleton Laboratory Didcot UK. 16Institute of Physics University of Belgrade Belgrade Serbia. 159Laboratório de Instrumentação e Física Experimental de Partículas-LIP Lisbon Portugal. 164Departamento de Fisica Teorica y del Cosmos and CAFPE Universidad de Granada Granada Spain. 30Department of Physics Boston University Boston MA USA. 94Joint Institute for Nuclear Research JINR Dubna Dubna Russia. 173INFN Sezione d

[This corrects the article dOI: 10.1140/epjc/s10052-017-4819-4.].

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Azimuthally differential Pion Femtoscopy in Pb-Pb Collisions at sNN=2.76 TeV

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Physical review Letters 2017年第22期118卷 222301-222301页

作者： d. Adamová M. M. Aggarwal G. Aglieri rinella M. Agnello N. Agrawal Z. Ahammed S. Ahmad S. U. Ahn S. Aiola A. Akindinov S. N. Alam d. S. d. Albuquerque d. Aleksandrov B. Alessandro d. Alexandre r. Alfaro Molina A. Alici A. Alkin J. Alme T. Alt S. Altinpinar I. Altsybeev C. Alves Garcia Prado M. An C. Andrei H. A. Andrews A. Andronic V. Anguelov C. Anson T. Antičić F. Antinori P. Antonioli r. Anwar L. Aphecetche H. Appelshäuser S. Arcelli r. Arnaldi O. W. Arnold I. C. Arsene M. Arslandok B. Audurier A. Augustinus r. Averbeck M. d. Azmi A. Badalà Y. W. Baek S. Bagnasco r. Bailhache r. Bala A. Baldisseri M. Ball r. C. Baral A. M. Barbano r. Barbera F. Barile L. Barioglio G. G. Barnaföldi L. S. Barnby V. Barret P. Bartalini K. Barth J. Bartke E. Bartsch M. Basile N. Bastid S. Basu B. Bathen G. Batigne A. Batista Camejo B. Batyunya P. C. Batzing I. G. Bearden H. Beck C. Bedda N. K. Behera I. Belikov F. Bellini H. Bello Martinez r. Bellwied L. G. E. Beltran V. Belyaev G. Bencedi S. Beole A. Bercuci Y. Berdnikov d. Berenyi r. A. Bertens d. Berzano L. Betev A. Bhasin I. r. Bhat A. K. Bhati B. Bhattacharjee J. Bhom L. Bianchi N. Bianchi C. Bianchin J. Bielčík J. Bielčíková A. Bilandzic G. Biro r. Biswas S. Biswas J. T. Blair d. Blau C. Blume G. Boca F. Bock A. Bogdanov L. Boldizsár M. Bombara G. Bonomi M. Bonora J. Book H. Borel A. Borissov M. Borri E. Botta C. Bourjau P. Braun-Munzinger M. Bregant T. A. Broker T. A. Browning M. Broz E. J. Brucken E. Bruna G. E. Bruno d. Budnikov H. Buesching S. Bufalino P. Buhler S. A. I. Buitron P. Buncic O. Busch Z. Buthelezi J. B. Butt J. T. Buxton J. Cabala d. Caffarri H. Caines A. Caliva E. Calvo Villar P. Camerini A. A. Capon F. Carena W. Carena F. Carnesecchi J. Castillo Castellanos A. J. Castro E. A. r. Casula C. Ceballos Sanchez P. Cerello B. Chang S. Chapeland M. Chartier J. L. Charvet S. Chattopadhyay A. Chauvin M. Cherney C. Cheshkov B. Cheynis V. Chibante Barroso d. d. Chinellato S. Cho P. Chochula K. Choi M. Chojnacki S. Choudhury P. Christakoglou C. H. Christensen P. Christ Nuclear Physics Institute Academy of Sciences of the Czech Republic Řež u Prahy Czech Republic Physics Department Panjab University Chandigarh India European Organization for Nuclear Research (CERN) Geneva Switzerland Dipartimento DISAT del Politecnico and Sezione INFN Turin Italy Sezione INFN Turin Italy Indian Institute of Technology Bombay (IIT) Mumbai India Variable Energy Cyclotron Centre Kolkata India Department of Physics Aligarh Muslim University Aligarh India Korea Institute of Science and Technology Information Daejeon South Korea Yale University New Haven Connecticut USA Institute for Theoretical and Experimental Physics Moscow Russia Universidade Estadual de Campinas (UNICAMP) Campinas Brazil National Research Centre Kurchatov Institute Moscow Russia School of Physics and Astronomy University of Birmingham Birmingham United Kingdom Instituto de Física Universidad Nacional Autónoma de México Mexico City Mexico Centro Fermi - Museo Storico della Fisica e Centro Studi e Ricerche “Enrico Fermi’ Rome Italy Sezione INFN Bologna Italy Bogolyubov Institute for Theoretical Physics Kiev Ukraine Department of Physics and Technology University of Bergen Bergen Norway Faculty of Engineering Bergen University College Bergen Norway Frankfurt Institute for Advanced Studies Johann Wolfgang Goethe-Universität Frankfurt Frankfurt Germany V. Fock Institute for Physics St. Petersburg State University St. Petersburg Russia Universidade de S ao Paulo (USP) S ao Paulo Brazil Central China Normal University Wuhan China National Institute for Physics and Nuclear Engineering Bucharest Romania Research Division and ExtreMe Matter Institute EMMI GSI Helmholtzzentrum für Schwerionenforschung GmbH Darmstadt Germany Physikalisches Institut Ruprecht-Karls-Universität Heidelberg Heidelberg Germany Physics Department Creighton University Omaha Nebraska USA Rudjer Bošković Institute Zagreb Croatia Sezione INFN Padova Italy University of Houston Houston Texas US

We present the first azimuthally differential measurements of the pion source size relative to the second harmonic event plane in Pb-Pb collisions at a center-of-mass energy per nucleon-nucleon pair of sNN=2.76 TeV. The measurements have been performed in the centrality range 0%–50% and for pion pair transverse momenta 0.2d that the rside and rout radii, which characterize the pion source size in the directions perpendicular and parallel to the pion transverse momentum, oscillate out of phase, similar to what was observed at the relativistic Heavy Ion Collider. The final-state source eccentricity, estimated via rside oscillations, is found to be significantly smaller than the initial-state source eccentricity, but remains positive—indicating that even after a stronger expansion in the in-plane direction, the pion source at the freeze-out is still elongated in the out-of-plane direction. The 3+1d hydrodynamic calculations are in qualitative agreement with observed centrality and transverse momentum rside oscillations, but systematically underestimate the oscillation magnitude.

关键词： relativistic heavy-ion collisions

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