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Latin America Optics and Photonics Conference, LAOP 2014

作者： Martelli, Cicero da Silva, Marco J. da Silva, Jean C. C. Morales, Rigoberto Pipa, Daniel R. da Silva, Erlon V. Zamarreño, Carlos R. Baroncini, Virginia Mezzadri, Felipe Patyk, Rodolfo Dutra, Guilherme Bazzo, João Vendruscolo, Tiago Graduate School on Electrical Engineering and Applied Computer Science Federal University of Technology - Paraná Curitiba PR80230-901 Brazil Department of Mechanical Engineering Federal University of Technology - Paraná Curitiba PR80230-901 Brazil Electrical and Electronic Engineering Department Public University of Navarra Pamplona NA Spain

A variety of photonic sensors is used to monitor industrial processes related to oil and engine industries. Single point, quasi-distributed and distributed optical sensors are demonstrated to be robust and reliable to... 详细信息

ISBN: (纸本)9781557528254

关键词： Crude oil

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Two-phase flow imaging by means of an 8x8 optical fiber bragg grating grid

Two-phase flow imaging by means of an 8x8 optical fiber brag...

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Bragg Gratings, Photosensitivity, and Poling in Glass Waveguides, BGPP 2014

作者： Zamarreño, C.R. Martelli, C. Baroncini, V.H.V. dos Santos, E.N. da Silva, M.J. Morales, R.E.M. Matias, I.R. Arregui, F.J. Electrical and Electronic Engineering Department Public University of Navarra PamplonaNA Spain Graduate School on Electrical Engineering and Applied Computer Science Federal University of Technology - Paraná CuritibaPR80230-901 Brazil Department of Mechanical Engineering Federal University of Technology - Paraná CuritibaPR80230-901 Brazil

Two-phase flows characterization by means of the utilization of an optical fiber Bragg grating (FBG) grid is presented. The force applied by the air/liquid flow on the FBGs is the underlying mechanism of this sensor. ... 详细信息

ISBN: (纸本)9781557528209

关键词： Two phase flow

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Search for B−L R-parity-violating top squarks in s=13 TeV pp collisions with the ATLAS experiment

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Physical Review D 2018年第3期97卷 032003-032003页

作者： M. Aaboud G. Aad B. Abbott O. Abdinov B. Abeloos S. H. Abidi O. S. AbouZeid N. L. Abraham H. Abramowicz H. Abreu R. Abreu Y. Abulaiti B. S. Acharya S. Adachi L. Adamczyk J. Adelman M. Adersberger T. Adye A. A. Affolder Y. Afik T. Agatonovic-Jovin C. Agheorghiesei J. A. Aguilar-Saavedra S. P. Ahlen F. Ahmadov G. Aielli S. Akatsuka H. Akerstedt T. P. A. Åkesson E. Akilli A. V. Akimov G. L. Alberghi J. Albert P. Albicocco M. J. Alconada Verzini S. C. Alderweireldt 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. I. 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 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 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 R. E. Ardell 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 L. Asquith K. Assamagan R. Astalos M. Atkinson N. B. Atlay K. Augsten G. Avolio B. Axen M. K. Ayoub G. Azuelos A. E. Baas M. J. Baca H. Bachacou K. Bachas M. Backes P. Bagnaia M. Bahmani H. Bahrasemani J. T. Baines M. Bajic O. K. Baker P. J. Bakker E. M. Baldin P. Balek F. Balli W. K. Balunas E. Banas A. Bandyopadhyay Sw. Banerjee A. A. E. Bannoura L. Barak E. L. Barberio D. Barberis M. Barbero T. Barillari M-S Barisits J. T. Barkeloo 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. Faculté des Sciences Université Mohamed Premier and LPTPM Oujda Morocco CPPM Aix-Marseille Université and CNRS/IN2P3 Marseille France Homer L. Dodge Department of Physics and Astronomy University of Oklahoma Norman Oklahoma USA Institute of Physics Azerbaijan Academy of Sciences Baku Azerbaijan LAL Univ. Paris-Sud CNRS/IN2P3 Université Paris-Saclay Orsay France Department of Physics University of Toronto Toronto Ontario Canada Santa Cruz Institute for Particle Physics University of California Santa Cruz Santa Cruz California USA Department of Physics and Astronomy University of Sussex Brighton United Kingdom Raymond and Beverly Sackler School of Physics and Astronomy Tel Aviv University Tel Aviv Israel Department of Physics Technion: Israel Institute of Technology Haifa Israel Center for High Energy Physics University of Oregon Eugene Oregon USA Department of Physics Stockholm University Sweden The Oskar Klein Centre Stockholm Sweden INFN Gruppo Collegato di Udine Sezione di Trieste Udine Italy ICTP Trieste Italy International Center for Elementary Particle Physics and Department of Physics The University of Tokyo Tokyo Japan AGH University of Science and Technology Faculty of Physics and Applied Computer Science Krakow Poland Department of Physics Northern Illinois University DeKalb Illinois USA Fakultät für Physik Ludwig-Maximilians-Universität München München Germany Particle Physics Department Rutherford Appleton Laboratory Didcot United Kingdom Institute of Physics University of Belgrade Belgrade Serbia Department of Physics Alexandru Ioan Cuza University of Iasi Iasi Romania Laboratório de Instrumentação e Física Experimental de Partículas—LIP Lisboa Portugal Departamento de Fisica Teorica y del Cosmos Universidad de Granada Granada Portugal Department of Physics Boston University Boston Massachusetts USA Joint Institute for Nuclear Research JINR Dubna Dubna Russia INFN Sezione di Roma Tor Vergata Italy Dipartimento di Fisica Univ

A search is presented for the direct pair production of the stop, the supersymmetric partner of the top quark, that decays through an R-parity-violating coupling to a final state with two leptons and two jets, at least one of which is identified as a b-jet. The data set corresponds to an integrated luminosity of 36.1 fb−1 of proton-proton collisions at a center-of-mass energy of s=13 TeV, collected in 2015 and 2016 by the ATLAS detector at the LHC. No significant excess is observed over the Standard Model background, and exclusion limits are set on stop pair production at a 95% confidence level. Lower limits on the stop mass are set between 600 GeV and 1.5 TeV for branching ratios above 10% for decays to an electron or muon and a b-quark.

关键词： Supersymmetric models Baryon & lepton number symmetries Supersymmetry

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Search for squarks and gluinos in final states with jets and missing transverse momentum using 36 fb−1 of s=13 TeV pp collision data with the ATLAS detector

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Physical Review D 2018年第11期97卷 112001-112001页

作者： M. Aaboud G. Aad B. Abbott O. Abdinov B. Abeloos S. H. Abidi O. S. AbouZeid N. L. Abraham H. Abramowicz H. Abreu R. Abreu Y. Abulaiti B. S. Acharya S. Adachi L. Adamczyk J. Adelman M. Adersberger T. Adye A. A. Affolder T. Agatonovic-Jovin C. Agheorghiesei J. A. Aguilar-Saavedra S. P. Ahlen F. Ahmadov G. Aielli S. Akatsuka H. Akerstedt T. P. A. Åkesson E. Akilli A. V. Akimov G. L. Alberghi J. Albert P. Albicocco M. J. Alconada Verzini S. C. Alderweireldt 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. I. 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 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 R. E. Ardell 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 L. Asquith K. Assamagan R. Astalos M. Atkinson N. B. Atlay K. Augsten G. Avolio B. Axen M. K. Ayoub G. Azuelos A. E. Baas M. J. Baca H. Bachacou K. Bachas M. Backes M. Backhaus P. Bagnaia M. Bahmani H. Bahrasemani J. T. Baines M. Bajic O. K. Baker E. M. Baldin P. Balek F. Balli W. K. Balunas E. Banas A. Bandyopadhyay Sw. Banerjee A. A. E. Bannoura L. Barak E. L. Barberio D. Barberis M. Barbero T. Barillari M-S Barisits J. T. Barkeloo 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. Faculté des Sciences Université Mohamed Premier and LPTPM Oujda Morocco CPPM Aix-Marseille Université and CNRS/IN2P3 Marseille France Homer L. Dodge Department of Physics and Astronomy University of Oklahoma Norman Oklahoma USA Institute of Physics Azerbaijan Academy of Sciences Baku Azerbaijan LAL Univ. Paris-Sud CNRS/IN2P3 Université Paris-Saclay Orsay France Department of Physics University of Toronto Toronto Ontario Canada Santa Cruz Institute for Particle Physics University of California Santa Cruz Santa Cruz California USA Department of Physics and Astronomy University of Sussex Brighton United Kingdom Raymond and Beverly Sackler School of Physics and Astronomy Tel Aviv University Tel Aviv Israel Department of Physics Technion: Israel Institute of Technology Haifa Israel Center for High Energy Physics University of Oregon Eugene Oregon USA Department of Physics Stockholm University Sweden The Oskar Klein Centre Stockholm Sweden INFN Gruppo Collegato di Udine Sezione di Trieste Udine Italy ICTP Trieste Italy International Center for Elementary Particle Physics and Department of Physics The University of Tokyo Tokyo Japan AGH University of Science and Technology Faculty of Physics and Applied Computer Science Krakow Poland Department of Physics Northern Illinois University DeKalb Illinois USA Fakultät für Physik Ludwig-Maximilians-Universität München München Germany Particle Physics Department Rutherford Appleton Laboratory Didcot United Kingdom Institute of Physics University of Belgrade Belgrade Serbia Department of Physics Alexandru Ioan Cuza University of Iasi Iasi Romania Laboratório de Instrumentação e Física Experimental de Partículas - LIP Lisboa Portugal Departamento de Fisica Teorica y del Cosmos Universidad de Granada Granada Portugal Department of Physics Boston University Boston Massachusetts USA Joint Institute for Nuclear Research JINR Dubna Dubna Russia INFN Sezione di Roma Tor Vergata Italy Dipartimento di Fisi

A search for the supersymmetric partners of quarks and gluons (squarks and gluinos) in final states containing hadronic jets and missing transverse momentum, but no electrons or muons, is presented. The data used in this search were recorded in 2015 and 2016 by the ATLAS experiment in s=13 TeV proton-proton collisions at the Large Hadron Collider, corresponding to an integrated luminosity of 36.1 fb−1. The results are interpreted in the context of various models where squarks and gluinos are pair produced and the neutralino is the lightest supersymmetric particle. An exclusion limit at the 95% confidence level on the mass of the gluino is set at 2.03 TeV for a simplified model incorporating only a gluino and the lightest neutralino, assuming the lightest neutralino is massless. For a simplified model involving the strong production of mass-degenerate first- and second-generation squarks, squark masses below 1.55 TeV are excluded if the lightest neutralino is massless. These limits substantially extend the region of supersymmetric parameter space previously excluded by searches with the ATLAS detector.

关键词： Hadron-hadron interactions Supersymmetric models Particle data analysis

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Thermal fluctuations in superconductor/ferromagnet nanostripes

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Physical Review B 2015年第1期92卷 014501-014501页

作者： U. Nasti L. Parlato M. Ejrnaes R. Cristiano T. Taino H. Myoren Roman Sobolewski G. Pepe Dipartimento di Fisica Università degli Studi di Napoli Federico II I-80125 Napoli Italy CNR-SPIN Institute of Superconductors Innovative Materials and Devices UOS-Napoli I-80125 Napoli Italy Graduate School of Science and Engineering Saitama University 338-8570 Saitama Japan Institute of Electron Technology PL-02668 Warszawa Poland Departments of Electrical and Computer Engineering and Physics and Astronomy and Laboratory for Laser Energetics University of Rochester New York 14627-0231 USA

Thermal fluctuations in hybrid superconductor/ferromagnetic NbN/NiCu bilayers, as well as in pure superconducting NbN, two-dimensional (2D), nanostripes, have been investigated in order to understand the origin of dark counts in superconducting nanostripes when operated as single-photon detectors in the temperature range from 4.2to8K. In 2D superconductors, the dynamics of vortex motion play a significant role in the formation of a transient normal state, leading to dark-count events in current-biased nanostripes. By introducing a weak ferromagnetic overlayer on top of pure NbN, we managed to control the vortex dynamics, which subsequently enabled us to differentiate between several proposed theoretical models. In particular, a 6−nm−thick NiCu film grown on top of 8−nm−thick NbN nanostripes led to an enhanced critical current density in the resulting nanostructure, as well as significantly lowered fluctuation rates, as compared to pure NbN structures, leading to reduced dark counts. The enhancement of pinning in NbN/NiCu bilayers provided evidence that thermal excitations of single vortices (vortex hopping) near the edge of a 2D nanostripe were the dominant mechanism of the observed dark-count transients. On the other hand, in pure NbN the leading source of thermal fluctuations was the current-assisted thermal unbinding of vortex-antivortex pairs.

关键词： TEMPERATURE RANGE Bilayers Theoretical Models Superconductivity Vortex motion Bias currents vortices Critical current density fluctuations Thermal

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Analytical and experimental studies on human body communication between wristwatch and handheld devices using muscle homogenous phantom at 10 MHz

Analytical and experimental studies on human body communicat...

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作者： Muramatsu, Dairoku Koshiji, Fukuro Koshiji, Kohji Sasaki, Ken Department of Human and Engineered Environmental Studies Graduate School of Frontier Science University of Tokyo 5-1-5 Kashiwano-ha Kashiwa-shi Chiba277-8563 Japan Program in Electrical Engineering Graduate School of Engineering Kokushikan University 4-28-1 Setagaya Setagaya-ku Tokyo154-8515 Japan Department of Electrical Engineering Graduate School of Science and Technology Tokyo University of Science 2641 Yamazaki Noda-shi Chiba278-8510 Japan

In human body communication, it is important to investigate the input impedance characteristics of electrodes and transmission characteristics between transceivers for improving the qualities of communication and reducing power consumption. In this work, we studied the input impedance characteristics and transmission characteristics between a wristwatch device and a handheld device using both a three-dimensional electromagnetic field simulation and experiment at 10 MHz. The input impedance and transmission characteristics obtained from the simulation using a muscle homogenous model and those obtained from the measurement using a muscle-tissue-equivalent phantom showed good consistency. The calculated electric field around a human arm decreased as it moved away from the surface of the arm. This distribution of the electric field showed the advantages of human body communication, which are confidential communication and electromagnetic compatibility (EMC). Moreover, power consumption at the feeding point of the system was calculated from the transmission characteristics obtained from the simulation. This result indicated that human body communication achieves low-power consumption.

关键词： Electrodes

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Discrete approach to electrical resistance tomography with applications to distributed network sensing

Discrete approach to electrical resistance tomography with a...

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International Symposium on Telecommunications

作者： Frederico M. Aguiar Daniel R. Pipa Marco J. Da Silva Graduate School of Electrical Engineering & Computer Science Federal University of Technology Parana Brazil

Most of electrical resistance tomography literature is aimed at biomedical application, where one wishes to estimate the conductivity distribution of some portion of human body in order to detect some health disorder. The solution to this problem often starts considering a continuous media, which requires subsequent discretization through finite element simulations or other sophisticated methods. In this paper, we propose an alternative and purely discrete approach. We pose the problem as a resistor grid, or network, of which only the peripheral elements are accessible for measurements. By injecting known electrical current externally, we want to estimate all the conductances of the network given only boundary voltage measurements. Since the relation between conductance values and voltage measurement is nonlinear, we present two solutions to the problem: one based on iterative linearization and another based on neural network, which solves the problem directly in the nonlinear domain. Finally, we present simulated experiments to demonstrate the viability of the proposed approach and highlight possible applications of the developed technique.

关键词： Tomography Voltage measurement Image reconstruction Neurons Artificial neural networks Resistors Impedance

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TWO-DIMENSIONAL LOCAL TERNARY PATTERNS USING SYNCHRONIZED IMAGES FOR OUTDOOR PLACE CATEGORIZATION

TWO-DIMENSIONAL LOCAL TERNARY PATTERNS USING SYNCHRONIZED IM...

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IEEE International Conference on Image Processing

作者： Hojung Jung Ryo Kurazume Yumi Iwashita Oscar Martinez Mozos Kyushu University Graduate Faculty of Information Science and Electrical Engineering University of Lincoln School of Computer Science

ISBN: (纸本)9781479957521

We present a novel approach for outdoor place categorization using synchronized texture and depth images obtained using a laser scanner. Categorizing outdoor places according to type is useful for autonomous driving or service robots, which work adaptively according to the surrounding conditions. However, place categorization is not straight forward due to the wide variety of environments and sensor performance limitations. In the present paper, we introduce a two-dimensional local ternary pattern (2D-LTP) descriptor using a pair of synchronized texture and depth images. The proposed 2D-LTP describes the local co-occurrence of a synchronized and complementary image pair with ternary patterns. In the present study, we construct histograms of a 2D-LTP as a feature of an outdoor place and apply singular value decomposition (SVD) to deal with the high dimensionality of the place. The novel descriptor, i.e., the 2D-LTP, exhibits a higher categorization performance than conventional image descriptors with outdoor place experiments.

关键词： Two-dimensional Local Ternary Pattern (2D-LTP) Place categorization Laser scanner Reflectance image Depth image

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Characteristics Study of Neural Network Aided Digital Control for DC-DC Converter

Characteristics Study of Neural Network Aided Digital Contro...

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International Power Electronics Conference

作者： Hidenori Maruta Masashi Motomura Fujio Kurokawa Division of Electrical Engineering and Computer Science Faculty of Engineering Nagasaki University Graduate School of Engineering Nagasaki University

ISBN: (纸本)9781479927067

This paper studies the digital controlled dc-dc converter which employs the neural network in coordination with PID control. Especially, we focus on the problem of overcompensation to the transient response of the output voltage in the dc-dc converter by the neural network control. Our previous studies suggested that the neural network control is effective to improve the transient response of the output voltage. Therefore, it can contribute to the low power consumption of power supplies for information and communication systems. However, the neural network aided control has a problem that it tends to be overcompensation, i.e., the compensation effect of the neural network becomes too much and badly affects to control the plant. The overcompensation causes from a delay time in sensing and calculation to determine the timing and duration of the neural network control itself. To address the problem of overcompensation, our previous studies investigated methods to devise the timing and duration of neural network control. However, since they need some pre-determined parameters which are optimized to the specific target converter to avoid the effect of delay, the implementation of it tends to be complicated one in practical use. In this study, we adopt the neural network which predicts parameters to improve the transient response and control timing and duration of itself. Therefore, it does not need any predetermined parameters for timing and duration control. From the simulation result for evaluation, it is confirmed that the presented method has a superior transient characteristics compared with conventional method.

关键词： Neural network Digital control Dc-dc converter

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Real-time process synchronization for systems with accelerators 14

Real-time process synchronization for systems with accelerat...

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2014 Conference on Research in Adaptive and Convergent Systems, RACS 2014

作者： Huang, Kuan-Chung Wu, Yu-Chen Chang, Che-Wei Kuo, Tei-Wei Shih, Chi-Sheng Deng, Qingxu Department of Computer Science and Information Engineering National Taiwan University Taiwan Department of Computer Science and Information Engineering School of Electrical and Computer Engineering College of Engineering Taiwan Research Center for Information Technology Innovation Academia Sinica Taiwan Graduate Institute of Networking and Multimedia National Taiwan University Taiwan College of Information Science and Engineering Northeastern University China

ISBN: (纸本)9781450330602

This work is motivated by the needs to manage the priority inversion problem without sacrificing the utilization of increasingly popular hardware accelerators. A new mechanism is developed to dedicate accelerators to selected higher-priority tasks. The floor and ceiling priorities of accelerators are thus proposed as an extension of the concept of semaphore priority ceiling to guarantee at most two priority inversions for any real-time task in a uniprocessor system with multiple accelerators. The properties of the proposed concept are explored with respect to blocking behaviors over the CPU and accelerators and are verified by a series of experiments, for which the insight of the simple but effective idea is evaluated and presented. © 2014 ACM.

关键词： Blocking time analysis Dedicated accelerators Synchronization protocols

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