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Search for Diphoton Events with Large Missing Transverse Energy in 7 TeV Proton-Proton Collisions with the ATLAS Detector

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Physical Review Letters 2011年第12期106卷 121803-121803页

作者： G. Aad B. Abbott J. Abdallah A. A. Abdelalim A. Abdesselam O. Abdinov B. Abi M. Abolins H. Abramowicz H. Abreu E. Acerbi B. S. Acharya M. Ackers D. L. Adams T. N. Addy J. Adelman M. Aderholz S. Adomeit P. Adragna T. Adye S. Aefsky J. A. Aguilar-Saavedra M. Aharrouche S. P. Ahlen F. Ahles A. Ahmad M. Ahsan G. Aielli T. Akdogan T. P. A. Åkesson G. Akimoto A. V. Akimov M. S. Alam M. A. Alam S. Albrand M. Aleksa I. N. Aleksandrov M. Aleppo F. Alessandria C. Alexa G. Alexander G. Alexandre T. Alexopoulos M. Alhroob M. Aliev G. Alimonti J. Alison M. Aliyev P. P. Allport S. E. Allwood-Spiers J. Almond A. Aloisio R. Alon A. Alonso J. Alonso M. G. Alviggi K. Amako P. Amaral C. Amelung V. V. Ammosov A. Amorim G. Amorós N. Amram C. Anastopoulos T. Andeen C. F. Anders K. J. Anderson A. Andreazza V. Andrei M-L. Andrieux X. S. Anduaga A. Angerami F. Anghinolfi N. Anjos A. Annovi A. Antonaki M. Antonelli S. Antonelli J. Antos F. Anulli S. Aoun L. Aperio Bella R. Apolle G. Arabidze I. Aracena Y. Arai A. T. H. Arce J. P. Archambault S. Arfaoui J-F. Arguin E. Arik M. Arik A. J. Armbruster K. E. Arms S. R. Armstrong O. Arnaez C. Arnault A. Artamonov G. Artoni D. Arutinov S. Asai R. Asfandiyarov S. Ask B. Åsman L. Asquith K. Assamagan A. Astbury A. Astvatsatourov G. Atoian B. Aubert B. Auerbach E. Auge K. Augsten M. Aurousseau N. Austin R. Avramidou D. Axen C. Ay G. Azuelos Y. Azuma M. A. Baak G. Baccaglioni C. Bacci A. M. Bach H. Bachacou K. Bachas G. Bachy M. Backes E. Badescu P. Bagnaia S. Bahinipati Y. Bai D. C. Bailey T. Bain J. T. Baines O. K. Baker S. Baker F. Baltasar Dos Santos Pedrosa E. Banas P. Banerjee Sw. Banerjee D. Banfi A. Bangert V. Bansal H. S. Bansil L. Barak S. P. Baranov A. Barashkou A. Barbaro Galtieri T. Barber E. L. Barberio D. Barberis M. Barbero D. Y. Bardin T. Barillari M. Barisonzi T. Barklow N. Barlow B. M. Barnett R. M. Barnett A. Baroncelli A. J. Barr F. Barreiro J. Barreiro Guimarães da Costa P. Barrillon R. Bartoldus A. E. Barton D. Bartsch R. L. Bates L. Batkova J. R. Batley A. Battaglia M. Battist Albert-Ludwigs-Universität Fakultät für Mathematik und Physik Hermann-Herder Str. 3 D - 79104 Freiburg i.Br. Germany University of Oklahoma Homer L. Dodge Department of Physics and Astronomy 440 West Brooks Room 100 Norman Oklahoma 73019-0225 USA Institut de Física d’Altes Energies IFAE Edifici Cn Universitat Autònoma de Barcelona ES - 08193 Bellaterra (Barcelona) Spain Université de Genève Section de Physique 24 rue Ernest Ansermet CH - 1211 Geneve 4 Switzerland Oxford University Department of Physics Denys Wilkinson Building Keble Road Oxford OX1 3RH United Kingdom Institute of Physics Azerbaijan Academy of Sciences H. Javid Avenue 33 AZ 143 Baku Azerbaijan Oklahoma State University Department of Physics 145 Physical Sciences Building Stillwater Oklahoma 74078-3072 USA Michigan State University Department of Physics and Astronomy High Energy Physics Group East Lansing Michigan 48824-2320 USA Tel Aviv University Raymond and Beverly Sackler School of Physics and Astronomy Ramat Aviv IL - Tel Aviv 69978 Israel LAL Université Paris-Sud IN2P3/CNRS Orsay France INFN Sezione di Milano Milano Italy Università di Milano Dipartimento di Fisica via Celoria 16 IT - 20133 Milano Italy INFN Gruppo Collegato di Udine Udine Italy ICTP Strada Costiera 11 IT-34014 Trieste Italy University of Bonn Physikalisches Institut Nussallee 12 D - 53115 Bonn Germany Brookhaven National Laboratory Physics Department Building 510A Upton New York 11973 USA Hampton University Department of Physics Hampton Virginia 23668 USA Yale University Department of Physics PO Box 208121 New Haven Connecticut 06520-8121 USA Max-Planck-Institut für Physik (Werner-Heisenberg-Institut) Föhringer Ring 6 80805 München Germany Ludwig-Maximilians-Universität München Fakultät für Physik Am Coulombwall 1 DE - 85748 Garching Germany Queen Mary University of London Department of Physics Mile End Road London E1 4NS United Kingdom Rutherford Appleton Laboratory Science and Technolo

A search for diphoton events with large missing transverse energy is presented. The data were collected with the ATLAS detector in proton-proton collisions at s=7 TeV at the CERN Large Hadron Collider and correspond to an integrated luminosity of 3.1 pb−1. No excess of such events is observed above the standard model background prediction. In the context of a specific model with one universal extra dimension with compactification radius R and gravity-induced decays, values of 1/R<729 GeV are excluded at 95% C. L., providing the most sensitive limit on this model to date.

关键词： Tellurium compounds

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Axisymmetric simulation of inductive measurement method for critical current density in bulk HTS: Relation between third harmonic voltage and coil current

Axisymmetric simulation of inductive measurement method for ...

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作者： Kamitani, Atsushi Takayama, Teruou Ikuno, Soichiro Graduate School of Science and Engineering Yamagata University Yamagata 992-8510 Japan Faculty of Engineering Yamagata University Yam- agata 992-8510 Japan School of Computer Science Tokyo University of Technology Tokyo 192-0982 Japan

The inductive measurement method for the critical current density in a bulk high-temperature superconductor (HTS) has been investigated by using the axisymmetric simulation. In the method, an ac current Io sin 2π ft is applied in a small coil placed just above a bulk HTS and, simultaneously, the third harmonic voltage V3 sin(67πft + θ3) is measured. In order to simulate the inductive method, Io - V 3 curves are determined by use of the simulation and, subsequently, the critical current density is estimated. The results of computations show that the accuracy of the inductive method is influenced by neither the frequency nor the applied dc magnetic field. © 2009 IEEE.

关键词： Finite element method

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Computational networks for knowledge representation

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World Academy of science, Engineering and technology 2009年 56卷 266-270页

作者： van Do, Nhon Faculty of Computer Science University of Information Technology Ho Chi Minh City Viet Nam

In the artificial intelligence field, knowledge representation and reasoning are important areas for intelligent systems, especially knowledge base systems and expert systems. Knowledge representation Methods has an important role in designing the systems. There have been many models for knowledge such as semantic networks, conceptual graphs, and neural networks. These models are useful tools to design intelligent systems. However, they are not suitable to represent knowledge in the domains of reality applications. In this paper, new models for knowledge representation called computational networks will be presented. They have been used in designing some knowledge base systems in education for solving problems such as the system that supports studying knowledge and solving analytic geometry problems, the program for studying and solving problems in Plane Geometry, the program for solving problems about alternating current in physics.

关键词： Knowledge representation

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Adaptive video-on-demand broadcasting in ubiquitous computing environment

Adaptive video-on-demand broadcasting in ubiquitous computin...

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作者： Peng, Chao Tan, Yasuo Xiong, Naixue Yang, Laurence T. Park, Jong Hyuk Kim, Soon-Seok Network Architecture Group National Institute of Information and Communications Technology 4-2-1 Nukui-Kitamachi Koganei Tokyo 184-8795 Japan Graduate School of Information Science Japan Advanced Institute of Science and Technology 1-1 Asahidai Nomi Ishikawa 923-1292 Japan Department of Computer Science Georgia State University Atlanta GA United States Department of Computer Science St. Francis Xavier University Antigonish NS B2G 2W5 Canada Department of Computer Science and Engineering Kyungnam University Masan Korea Republic of Department of Computer Engineering Halla University Wonju Korea Republic of

Video-on-demand (VOD) is a service that allows users to view any video program from a server at the time of their choice, such kind of services are expected to be popular in future ubiquitous computing environment. Lots of broadcasting protocols for VOD services have been proposed, but they usually focus only on the tradeoff between bandwidth and delay, thus they are usually not efficient for the local storage. Since the ubiquitous network is heterogeneous and users will have different resource and communication capability, we need to address the storage issue in VOD systems. In this paper, we present several new effective broadcasting schemes, which can intelligently adjust the solution according to available bandwidth and local storage to achieve an ideal waiting time. © Springer-Verlag London Limited 2009.

关键词： Video on demand

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Predicting unknown time arguments based on cross-event propagation

Predicting unknown time arguments based on cross-event propa...

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Joint Conference of the 47th Annual Meeting of the Association for Computational Linguistics and 4th International Joint Conference on Natural Language Processing of the AFNLP, ACL-IJCNLP 2009

作者： Gupta, Prashant Ji, Heng Indian Institute of Information Technology Allahabad Allahabad 211012 India Computer Science Department Queens College and the Graduate Center City University of New York New York NY 11367 United States

ISBN: (纸本)9781617382581

Many events in news articles don't include time arguments. This paper describes two methods, one based on rules and the other based on statistical learning, to predict the unknown time argument for an event by the propagation from its related events. The results are promising - the rule based approach was able to correctly predict 74% of the unknown event time arguments with 70% precision. © 2009 ACL and AFNLP.

关键词： Forecasting

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Threshold Multiparty Controlled Teleportation of Arbitrary m-Qubit Quantum information

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Communications in Theoretical Physics 2009年第10期52卷 593-596页

作者： YANG Yu-Guang WEN Qiao-Yan College of Computer Science and Technology Beijing University of Technology Beijing 100124 China State Key Laboratory of Integrated Services Network Xidian University Xi＇an 710071 China State Key Laboratory of Information Security （Graduate University of Chinese Academy of Sciences） Beijing 100049 China State Key Laboratory of Networking and Switching Technology Beijing University of Posts and Telecommunications Beijing 100876 China

We present a （t, .n） threshold multiparty controlled quantum teleportation protocol of an arbitrary m-qubit quantum state between two remote parties. The unknown m-qubit quantum state can be recovered by the receiver under control of a subset of the n controllers if the number of the subset is larger than or equal to a threshold, say, t, but not for any t - 1 or fewer controllers. Our scheme seems to be more practical and more flexible than other existing protocols. The quantum resource required is just m Einstein-Podolsky-Rosen （EPR） pairs plus some single photons. The techniques required are only Bell state measurement, single-qubit unitary operation and yon Neumann measurement. So our scheme is also feasible with present-day technique.

关键词： controlled teleportation threshold controlled teleportation entanglement

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Localization using iterative angle of arrival method sharing snapshots of coherent subarrays

Localization using iterative angle of arrival method sharing...

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Asia-Pacific Signal and information Processing Association 2009 Annual Summit and Conference, APSIPA ASC 2009

作者： Kawakami, Shun Ikeda, Shohei Ohtsukit, Tomoaki Graduate School of Science and Technology Keio University 3-14-1 Hiyoshi Kouhoku-ku Yokohama 223-8522 Japan Department of Information and Computer Science Keio University 3-14-1 Hiyoshi Kouhoku-ku Yokohama 223-8522 Japan

In this paper, we propose a localization method using iterative AOA (Angle of Arrival) method sharing snapshots of coherent subarrays. Generally, the conventional AOA method requires many antenna elements to improve the localization accuracy. Thus, AOA method is restricted in some applications because array antenna used in receivers is large. The proposed method improves localization accuracy without increasing elements of antenna arrays, and thus the lower costs and smaller devices are expected. Simulation results demonstrate that the localization accuracy of the proposed method is superior to that of the conventional method using the same number of antennas. Moreover, the proposed method shows the localization accuracy almost identical to that of the conventional method using array antennas with more elements.

关键词： Antenna arrays

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Improvement of estimation accuracy of wideband DOA estimation "TOPS"

Improvement of estimation accuracy of wideband DOA estimatio...

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Asia-Pacific Signal and information Processing Association 2009 Annual Summit and Conference, APSIPA ASC 2009

作者： Okane, Kazuki Ikedat, Shohei Ohtsuki, Tomoaki Graduate School of Science and Technology Keio University 3-14-1 Hiyoshi Kohoku-ku Yokohama 223-8522 Japan Department of Computer and Information Science Keio University 3-14-1 Hiyoshi Kohoku-ku Yokohama 223-8522 Japan

In this paper, a new direction-of-arrival (DOA) estimation method for wideband signals is introduced. This new method is based on test of orthogonality of projected subspaces (TOPS) and estimated DOAs by measuring the orthogonal relation between the signal and noise subspaces of multiple frequency components of the signals. Unlike other coherent wideband methods, such as the coherent signal subspace method (CSSM), the new method does not require any preprocessing for initial values of DOA, like TOPS. The resolution and root mean square error (RMSE) of the proposed method is compared with those of CSSM, TOPS and test of orthogonality of frequency subspaces (TOFS) through computer simulations. The simulation results show that the resolution of the proposed method is better than that of TOPS in low and mid signal-to-noise ratio (SNR) ranges. They also show that RMSE of the proposed method is better than that of TOPS in mid SNR ranges.

关键词： Signal to noise ratio

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A recommendation method considering users' time series contexts 09

A recommendation method considering users' time series conte...

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3rd International Conference on Ubiquitous information Management and Communication, ICUIMC'09

作者： Oku, Kenta Nakajima, Shinsuke Miyazaki, Jun Uemura, Shunsuke Kato, Hirokazu Graduate School of Information Science Nara Institute of Science and Technology Ikoma City Nara 630-0101 Japan Faculty of Computer Science and Engineering Kyoto Sangyo University Motoyama Kamigamo Kita-Ku Kyoto-City 603-8555 Japan Department of Informatics Faculty of Informatics Nara Sangyo University 12-1 Tatsuno-kita 3-chome Sango-cho Ikoma-gun Nara 636-8503 Japan

ISBN: (纸本)9781605584058

This paper proposes a recommendation method considering users' time series contexts which are situations that have occurred/will occur in the past/future. There are some recommendation methods that provide information suitable for users' action patterns as the recommendation methods considering them. These methods provide information referring to the other users that have a similar action pattern to that of an active user. However, since a user's action pattern changes depending on the user's contexts, the methods need to refer to the other users' action patterns related to the current user's contexts. In this paper, we propose a recommendation method considering the user's time series contexts considering that the user's action pattern changes depending on the user's contexts. Copyright 2009 ACM.

关键词： Time series

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GaChat:A chat system that displays online retrieval information in dialogue text

GaChat:A chat system that displays online retrieval informat...

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IUI 2009 Workshop on Visual Interfaces to the Social and the Semantic Web, VISSW 2009

作者： Horiguchi, Satoshi Inoue, Akifumi Hoshi, Tohru Okada, Kenichi Graduate School of Science and Technology Keio University 3-14-l Hiyoshi Kohoku-ku Yokohama 223-8522 Japan School of Computer and Science Tokyo University of Technology 1404-1 Katakura Hachioji Tokyo 192-0982 Japan Faculty of Science and Technology Keio University 3-14-l Hiyoshi Kohoku-ku Yokohama 223-8522 Japan

Text chat systems are popular and widely used by a lot of users. However, there are sometimes redundant interactions between the users because of its less awareness. In this paper, we propose a text chat system called "GaChat", which simultaneously appends related information about the dialogue text between its users. First, proper nouns are extracted from the dialogue text by morphologic analysis. Then online images and articles related to the nouns are simultaneously displayed with the dialogue text. Such settlement of the ambiguity helps users to reduce redundant interactions like searching and asking the details of the phrase. This paper describes the prototype implementation and its first evaluation experiment.

关键词： Online systems

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