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Dark Energy Survey Year 1 results: Methodology and projections for joint analysis of galaxy clustering, galaxy lensing, and CMB lensing two-point functions

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Physical Review D 2019年第2期99卷 023508-023508页

作者： E. J. Baxter Y. Omori C. Chang T. Giannantonio D. Kirk E. Krause J. Blazek L. Bleem A. Choi T. M. Crawford S. Dodelson T. F. Eifler O. Friedrich D. Gruen G. P. Holder B. Jain M. Jarvis N. MacCrann A. Nicola S. Pandey J. Prat C. L. Reichardt S. Samuroff C. Sánchez L. F. Secco E. Sheldon M. A. Troxel J. Zuntz T. M. C. Abbott F. B. Abdalla J. Annis S. Avila K. Bechtol B. A. Benson E. Bertin D. Brooks E. Buckley-Geer D. L. Burke A. Carnero Rosell M. Carrasco Kind J. Carretero F. J. Castander R. Cawthon C. E. Cunha C. B. D’Andrea L. N. da Costa C. Davis J. De Vicente D. L. DePoy H. T. Diehl P. Doel J. Estrada A. E. Evrard B. Flaugher P. Fosalba J. Frieman J. García-Bellido E. Gaztanaga D. W. Gerdes R. A. Gruendl J. Gschwend G. Gutierrez W. G. Hartley D. Hollowood B. Hoyle D. J. James S. Kent K. Kuehn N. Kuropatkin O. Lahav M. Lima M. A. G. Maia M. March J. L. Marshall P. Melchior F. Menanteau R. Miquel A. A. Plazas A. Roodman E. S. Rykoff E. Sanchez R. Schindler M. Schubnell I. Sevilla-Noarbe M. Smith R. C. Smith M. Soares-Santos F. Sobreira E. Suchyta M. E. C. Swanson G. Tarle A. R. Walker W. L. K. Wu J. Weller Department of Physics and Astronomy University of Pennsylvania Philadelphia Pennsylvania 19104 USA Kavli Institute for Particle Astrophysics and Cosmology Stanford University 452 Lomita Mall Stanford California 94305 Dept. of Physics Stanford University 382 Via Pueblo Mall Stanford California 94305 Department of Physics and McGill Space Institute McGill University Montreal Quebec H3A 2T8 Canada Kavli Institute for Cosmological Physics University of Chicago Chicago Illinois 60637 USA Institute of Astronomy University of Cambridge Madingley Road Cambridge CB3 0HA United Kingdom Kavli Institute for Cosmology University of Cambridge Madingley Road Cambridge CB3 0HA United Kingdom Universitäts-Sternwarte Fakultät für Physik Ludwig-Maximilians Universität München Scheinerstr. 1 81679 München Germany Department of Physics & Astronomy University College London Gower Street London WC1E 6BT United Kingdom Department of Astronomy/Steward Observatory 933 North Cherry Avenue Tucson Arizona 85721-0065 USA Jet Propulsion Laboratory California Institute of Technology 4800 Oak Grove Dr. Pasadena California 91109 USA Center for Cosmology and Astro-Particle Physics The Ohio State University Columbus Ohio 43210 USA Institute of Physics Laboratory of Astrophysics École Polytechnique Fédérale de Lausanne (EPFL) Observatoire de Sauverny 1290 Versoix Switzerland Department of Physics University of Chicago 5640 South Ellis Avenue Chicago Illinois 60637 USA Argonne National Laboratory 9700 South Cass Avenue Lemont Illinois 60439 USA Scottish Universities Physics Alliance Institute for Astronomy University of Edinburgh Royal Observatory Blackford Hill Edinburgh EH9 3HJ United Kingdom Center for Cosmology and AstroParticle Physics The Ohio State University 191 West Woodruff Avenue Columbus Ohio 43210 USA Department of Astronomy and Astrophysics University of Chicago Chicago Illinois 60637 USA Observatories of the Carnegie Institution of Washington 813 Santa Ba

Optical imaging surveys measure both the galaxy density and the gravitational lensing-induced shear fields across the sky. Recently, the Dark Energy Survey (DES) Collaboration used a joint fit to two-point correlations between these observables to place tight constraints on cosmology (T. M. C. Abbott et al. (Dark Energy Survey Collaboration), Phys. Rev. D 98, 043526 (2018)). In this work, we develop the methodology to extend the DES Year 1 joint probes analysis to include cross-correlations of the optical survey observables with gravitational lensing of the cosmic microwave background as measured by the South Pole Telescope (SPT) and Planck. Using simulated analyses, we show how the resulting set of five two-point functions increases the robustness of the cosmological constraints to systematic errors in galaxy lensing shear calibration. Additionally, we show that contamination of the SPT+Planck cosmic microwave background lensing map by the thermal Sunyaev-Zel’dovich effect is a potentially large source of systematic error for two-point function analyses but show that it can be reduced to acceptable levels in our analysis by masking clusters of galaxies and imposing angular scale cuts on the two-point functions. The methodology developed here will be applied to the analysis of data from the DES, the SPT, and Planck in a companion work.

关键词： Cosmic microwave background Cosmological parameters Dark energy Evolution of the Universe Large scale structure of the Universe

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A Detection of CMB-Cluster Lensing using Polarization Data from SPTpol

arXiv

引用

arXiv 2019年

作者： Raghunathan, S. Patil, S. Baxter, E. Benson, B.A. Bleem, L.E. Crawford, T.M. Holder, G.P. McClintock, T. Reichardt, C.L. Varga, T.N. Whitehorn, N. Ade, P.A.R. Allam, S. Anderson, A.J. Austermann, J.E. Avila, S. Avva, J.S. Bacon, D. Beall, J.A. Bender, A.N. Bianchini, F. Bocquet, S. Brooks, D. Burke, D.L. Carlstrom, J.E. Carretero, J. Castander, F.J. Chang, C.L. Chiang, H.C. Citron, R. Costanzi, M. Crites, A.T. Costa, L.N. da Desai, S. Diehl, H.T. Dietrich, J.P. Dobbs, M.A. Doel, P. Everett, S. Evrard, A.E. Feng, C. Flaugher, B. Fosalba, P. Frieman, J. Gallicchio, J. García-Bellido, J. Gaztanaga, E. George, E.M. Giannantonio, T. Gilbert, A. Gruendl, R.A. Gschwend, J. Gupta, N. Gutierrez, G. Haan, T. de Halverson, N.W. Harrington, N. Henning, J.W. Hilton, G.C. Hollowood, D.L. Holzapfel, W.L. Honscheid, K. Hrubes, J.D. Huang, N. Hubmayr, J. Irwin, K.D. Jeltema, T. Kind, M. Carrasco Knox, L. Kuropatkin, N. Lahav, O. Lee, A.T. Li, D. Lima, M. Lowitz, A. Maia, M.A.G. Marshall, J.L. McMahon, J.J. Melchior, P. Menanteau, F. Meyer, S.S. Miquel, R. Mocanu, L.M. Mohr, J.J. Montgomery, J. Moran, C. Corbett Nadolski, A. Natoli, T. Nibarger, J.P. Noble, G. Novosad, V. Ogando, R.L.C. Padin, S. Plazas, A.A. Pryke, C. Rapetti, D. Romer, A.K. Roodman, A. Rosell, A. Carnero Rozo, E. Ruhl, J.E. Rykoff, E.S. Saliwanchik, B.R. Sanchez, E. Sayre, J.T. Scarpine, V. Schaffer, K.K. Schubnell, M. Serrano, S. Sevilla-Noarbe, I. Sievers, C. Smecher, G. Smith, M. Soares-Santos, M. Stark, A.A. Story, K.T. Suchyta, E. Swanson, M.E.C. Tarle, G. Tucker, C. Vanderlinde, K. Veach, T. de Vicente, J. Vieira, J.D. Vikram, V. Wang, G. Wu, W.L.K. Yefremenko, V. Zhang, Y. Department of Physics and Astronomy University of California Los AngelesCA90095 United States School of Physics University of Melbourne ParkvilleVIC3010 Australia Department of Physics and Astronomy University of Pennsylvania PhiladelphiaPA19104 United States Fermi National Accelerator Laboratory MS209 P.O. Box 500 BataviaIL60510 United States Kavli Institute for Cosmological Physics University of Chicago 5640 South Ellis Avenue ChicagoIL60637 United States Department of Astronomy and Astrophysics University of Chicago 5640 South Ellis Avenue ChicagoIL60637 United States High Energy Physics Division Argonne National Laboratory 9700 S. Cass Avenue ArgonneIL60439 United States Astronomy Department University of Illinois at Urbana-Champaign 1002 W. Green Street UrbanaIL61801 United States Department of Physics University of Illinois Urbana-Champaign 1110 W. Green Street UrbanaIL61801 United States Canadian Institute for Advanced Research CIFAR Program in Gravity and Extreme Universe TorontoONM5G 1Z8 Canada Department of Physics University of Arizona TucsonAZ85721 United States Max Planck Institute for Extraterrestrial Physics Giessenbachstrasse Garching85748 Germany Universitäts-Sternwarte Fakultät für Physik LudwigMaximilians Universität München Scheinerstr. 1 München81679 Germany Cardiff University CardiffCF10 3XQ United Kingdom Fermi National Accelerator Laboratory P. O. Box 500 BataviaIL60510 United States NIST Quantum Devices Group 325 Broadway Mailcode 817.03 BoulderCO80305 United States Instituto de Fisica Teorica UAM/CSIC Universidad Autonoma de Madrid Madrid28049 Spain Department of Physics University of California BerkeleyCA94720 United States Institute of Cosmology & Gravitation University of Portsmouth Dennis Sciama Building Burnaby Road PortsmouthPO1 3FX United Kingdom Faculty of Physics Ludwig-Maximilians-Universität Scheinerstr. 1 Munich81679 Germany Department of Physics & Astronomy University Co

We report the first detection of gravitational lensing due to galaxy clusters using only the polarization of the cosmic microwave background (CMB). The lensing signal is obtained using a new estimator that extracts the lensing dipole signature from stacked images formed by rotating the cluster-centered Stokes Q/U map cutouts along the direction of the locally measured background CMB polarization gradient. Using data from the SPTpol 500 deg2 survey at the locations of roughly 18,000 clusters with richness λ ≥ 10 from the Dark Energy Survey (DES) Year-3 full galaxy cluster catalog, we detect lensing at 4.8σ. The mean stacked mass of the selected sample is found to be (1.43 ± 0.40) × 1014 M☉which is in good agreement with optical weak lensing based estimates using DES data and CMB-lensing based estimates using SPTpol temperature data. This measurement is a key first step for cluster cosmology with future low-noise CMB surveys, like CMB-S4, for which CMB polarization will be the primary channel for cluster lensing measurements. Copyright © 2019, The Authors. All rights reserved.

关键词： Surveys

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The SPTpol extended cluster survey

arXiv

引用

arXiv 2019年

作者： Bleem, L.E. Bocquet, S. Stalder, B. Gladders, M.D. Ade, P.A.R. Allen, S.W. Anderson, A.J. Annis, J. Ashby, M.L.N. Austermann, J.E. Avila, S. Avva, J.S. Bayliss, M. Beall, J.A. Bechtol, K. Bender, A.N. Benson, B.A. Bertin, E. Bianchini, F. Blake, C. Brodwin, M. Brooks, D. Buckley-Geer, E. Burke, D.L. Carlstrom, J.E. Carnero Rosell, A. Carrasco Kind, M. Carretero, J. Chang, C.L. Chiang, H.C. Citron, R. Corbett Moran, C. Costanzi, M. Crawford, T.M. Crites, A.T. da Costa, L.N. de Haan, T. de Vicente, J. Desai, S. Diehl, H.T. Dietrich, J.P. Dobbs, M.A. Eifler, T.F. Everett, W. Flaugher, B. Floyd, B. Frieman, J. Gallicchio, J. García-Bellido, J. George, E.M. Gerdes, D.W. Gilbert, A. Gruen, D. Gruendl, R.A. Gschwend, J. Gupta, N. Gutierrez, G. Halverson, N.W. Harrington, N. Henning, J.W. Heymans, C. Holder, G.P. Hollowood, D.L. Holzapfel, W.L. Honscheid, K. Hrubes, J.D. Huang, N. Hubmayr, J. Irwin, K.D. James, D.J. Jeltema, T. Joudaki, S. Khullar, G. Klein, M. Knox, L. Kuropatkin, N. Lee, A.T. Li, D. Lidman, C. Lowitz, A. MacCrann, N. Mahler, G. Maia, M.A.G. Marshall, J.L. McDonald, M. McMahon, J.J. Melchior, P. Menanteau, F. Meyer, S.S. Miquel, R. Mocanu, L.M. Mohr, J.J. Montgomery, J. Nadolski, A. Natoli, T. Nibarger, J.P. Noble, G. Novosad, V. Padin, S. Palmese, A. Parkinson, D. Patil, S. Paz-Chinchón, F. Plazas, A.A. Pryke, C. Ramachandra, N.S. Reichardt, C.L. Remolina González, J.D. Romer, A.K. Roodman, A. Ruhl, J.E. Rykoff, E.S. Saliwanchik, B.R. Sanchez, E. Saro, A. Sayre, J.T. Schaffer, K.K. Schrabback, T. Serrano, S. Sharon, K. Sievers, C. Smecher, G. Smith, M. Soares-Santos, M. Stark, A.A. Story, K.T. Suchyta, E. Tarle, G. Tucker, C. Vanderlinde, K. Veach, T. Vieira, J.D. Wang, G. Weller, J. Whitehorn, N. Wu, W.L.K. Yefremenko, V. Zhang, Y. High Energy Physics Division Argonne National Laboratory 9700 South Cass Avenue LemontIL60439 United States Kavli Institute for Cosmological Physics University of Chicago 5640 South Ellis Avenue ChicagoIL60637 United States Department of Physics Ludwig-Maximilians-Universität Scheinerstr. 1 München81679 Germany LSST 933 North Cherry Avenue TucsonAZ85721 United States Center for Astrophysics Harvard & Smithsonian 60 Garden Street CambridgeMA02138 United States Department of Astronomy and Astrophysics University of Chicago 5640 South Ellis Avenue ChicagoIL60637 United States Cardiff University CardiffCF10 3XQ United Kingdom Kavli Institute for Particle Astrophysics & Cosmology Stanford University P. O. Box 2450 StanfordCA94305 United States Department of Physics Stanford University 382 Via Pueblo Mall StanfordCA94305 United States SLAC National Accelerator Laboratory 2575 Sand Hill Road Menlo ParkCA94025 United States Fermi National Accelerator Laboratory P. O. Box 500 BataviaIL60510 United States NIST Quantum Devices Group 325 Broadway Mailcode 817.03 BoulderCO80305 United States Instituto de Fisica Teorica UAM/CSIC Universidad Autonoma de Madrid Madrid28049 Spain Department of Physics University of California BerkeleyCA94720 United States Kavli Institute for Astrophysics and Space Research Massachusetts Institute of Technology 77 Massachusetts Avenue CambridgeMA02139 United States Department of Physics University of Cincinnati CincinnatiOH45221 United States Physics Department 2320 Chamberlin Hall University of Wisconsin-Madison 1150 University Avenue MadisonWI53706-1390 United States CNRS UMR 7095 Institut d’Astrophysique de Paris ParisF-75014 France Sorbonne Universités UPMC Univ Paris 06 UMR 7095 Institut d’Astrophysique de Paris ParisF-75014 France School of Physics University of Melbourne ParkvilleVIC3010 Australia Centre for Astrophysics & Supercomputing Swinburne University of Technology P.O. Box 21

We describe the observations and resultant galaxy cluster catalog from the 2770 deg2 SPTpol Extended Cluster Survey (SPT-ECS). Clusters are identified via the Sunyaev-Zel’dovich (SZ) effect, and confirmed with a combination of archival and targeted follow-up data, making particular use of data from the Dark Energy Survey (DES). With incomplete followup we have confirmed as clusters 244 of 266 candidates at a detection significance ξ ≥ 5 and an additional 204 systems at 4 500c ∼ 4.4 × 1014M*h−701 and a median redshift of z = 0.49, and we have identified 44 strong gravitational lenses in the sample thus far. Radio data are used to characterize contamination to the SZ signal;the median contamination for confirmed clusters is predicted to be ∼1% of the SZ signal at the ξ > 4 threshold, and 10% of their measured SZ flux. We associate SZ-selected clusters, from both SPT-ECS and the SPT-SZ survey, with clusters from the DES redMaPPer sample, and find an offset distribution between the SZ center and central galaxy in general agreement with previous work, though with a larger fraction of clusters with significant offsets. Adopting a fixed Planck-like cosmology, we measure the optical richness-to-SZ-mass (λ − M) relation and find it to be 28% shallower than that from a weak-lensing analysis of the DES data—a difference significant at the 4 σ level—with the relations intersecting at λ = 60 . The SPT-ECS cluster sample will be particularly useful for studying the evolution of massive clusters and, in combination with DES lensing observations and the SPT-SZ cluster sample, will be an important component of future cosmological analyses. Copyright © 2019, The Authors. All rights reserved.

关键词： Galaxies

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Galaxy clusters selected via the Sunyaev-Zel’dovich effect in the SPTpol 100-Square-Degree survey

arXiv

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arXiv 2019年

作者： Huang, N. Bleem, L.E. Stalder, B. Ade, P.A.R. Allen, S.W. Anderson, A.J. Austermann, J.E. Avva, J.S. Beall, J.A. Bender, A.N. Benson, B.A. Bianchini, F. Bocquet, S. Brodwin, M. Carlstrom, J.E. Chang, C.L. Chiang, H.C. Citron, R. Corbett Moran, C. Crawford, T.M. Crites, A.T. de Haan, T. Dobbs, M.A. Everett, W. Floyd, B. Gallicchio, J. George, E.M. Gilbert, A. Gladders, M.D. Guns, S. Gupta, N. Halverson, N.W. Harrington, N. Henning, J.W. Hilton, G.C. Holder, G.P. Holzapfel, W.L. Hrubes, J.D. Hubmayr, J. Irwin, K.D. Khullar, G. Knox, L. Lee, A.T. Li, D. Lowitz, A. McDonald, M. McMahon, J.J. Meyer, S.S. Mocanu, L.M. Montgomery, J. Nadolski, A. Natoli, T. Nibarger, J.P. Noble, G. Novosad, V. Padin, S. Patil, S. Pryke, C. Reichardt, C.L. Ruhl, J.E. Saliwanchik, B.R. Saro, A. Sayre, J.T. Schaffer, K.K. Sharon, K. Sievers, C. Smecher, G. Stark, A.A. Story, K.T. Tucker, C. Vanderlinde, K. Veach, T. Vieira, J.D. Wang, G. Whitehorn, N. Wu, W.L.K. Department of Physics University of California BerkeleyCA94720 United States High Energy Physics Division Argonne National Laboratory 9700 S. Cass Avenue ArgonneIL60439 United States Kavli Institute for Cosmological Physics University of Chicago 5640 South Ellis Avenue ChicagoIL60637 United States LSST 950 N Cherry Ave TucsonAZ United States Cardiff University CardiffCF10 3XQ United Kingdom Kavli Institute for Particle Astrophysics and Cosmology Stanford University 452 Lomita Mall StanfordCA94305 United States Department of Physics Stanford University 382 Via Pueblo Mall StanfordCA94305 United States SLAC National Accelerator Laboratory 2575 Sand Hill Road Menlo ParkCA94025 United States Fermi National Accelerator Laboratory MS209 P.O. Box 500 BataviaIL60510 United States NIST Quantum Devices Group 325 Broadway Mailcode 817.03 BoulderCO80305 United States Department of Astronomy and Astrophysics University of Chicago 5640 South Ellis Avenue ChicagoIL60637 United States School of Physics University of Melbourne ParkvilleVIC3010 Australia Department of Physics Ludwig-Maximilians-Universität Scheinerstr. 1 München81679 Germany Department of Physics and Astronomy University of Missouri 5110 Rockhill Road Kansas CityMO64110 United States Department of Physics University of Chicago 5640 South Ellis Avenue ChicagoIL60637 United States Enrico Fermi Institute University of Chicago 5640 South Ellis Avenue ChicagoIL60637 United States Department of Physics McGill University 3600 Rue University MontrealQCH3A 2T8 Canada School of Mathematics Statistics & Computer Science University of KwaZulu-Natal Durban South Africa University of Chicago 5640 South Ellis Avenue ChicagoIL60637 United States TAPIR Walter Burke Institute for Theoretical Physics California Institute of Technology 1200 E California Blvd PasadenaCA91125 United States California Institute of Technology MS 249-17 1216 E. California Blvd. PasadenaCA91125

We present a catalog of galaxy cluster candidates detected in 100 square degrees surveyed with the SPTpol receiver on the South Pole Telescope. The catalog contains 89 candidates detected with a signal-to-noise ratio greater than 4.6. The candidates are selected using the Sunyaev-Zel’dovich effect at 95 and 150 GHz. Using both space- and ground-based optical and infrared telescopes, we have confirmed 81 candidates as galaxy clusters. We use these follow-up images and archival images to estimate photometric redshifts for 66 galaxy clusters and spectroscopic observations to obtain redshifts for 13 systems. An additional 2 galaxy clusters are confirmed using the overdensity of near-infrared galaxies only, and are presented without redshifts. We find that 15 candidates (18% of the total sample) are at redshift of z ≥ 1.0, with a maximum confirmed redshift of zmax = 1.38 ± 0.10. We expect this catalog to contain every galaxy cluster with M500c > 2.6×1014M☉h−701 and z > 0.25 in the survey area. The mass threshold is approximately constant above z = 0.25, and the complete catalog has a median mass of approximately M500c = 2.7 × 1014M☉h−701. Compared to previous SPT works, the increased depth of the millimeter-wave data (11.2 and 6.5 µK-arcmin at 95 and 150 GHz, respectively) makes it possible to find more galaxy clusters at high redshift and lower mass. Copyright © 2019, The Authors. All rights reserved.

关键词： Infrared devices

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Security loophole in free-space quantum key distribution due to spatial-mode detector-efficiency mismatch

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Physical Review A 2015年第6期91卷 062301-062301页

作者： Shihan Sajeed Poompong Chaiwongkhot Jean-Philippe Bourgoin Thomas Jennewein Norbert Lütkenhaus Vadim Makarov Institute for Quantum Computing University of Waterloo Waterloo Ontario N2L 3G1 Canada Department of Electrical and Computer Engineering University of Waterloo Waterloo Ontario N2L 3G1 Canada Department of Physics and Astronomy University of Waterloo Waterloo Ontario N2L 3G1 Canada Quantum Information Science Program Canadian Institute for Advanced Research Toronto Ontario M5G 1Z8 Canada

In free-space quantum key distribution (QKD), the sensitivity of the receiver's detector channels may depend differently on the spatial mode of incoming photons. Consequently, an attacker can control the spatial mode to break security. We experimentally investigate a standard polarization QKD receiver and identify sources of efficiency mismatch in its optical scheme. We model a practical intercept-and-resend attack and show that it would break security in most situations. We show experimentally that adding an appropriately chosen spatial filter at the receiver's entrance may be an effective countermeasure.

关键词： QUANTUM mechanics SENSITIVITY analysis PHOTONS INFORMATION storage & retrieval systems -- Security measures OPTICAL polarization

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Design of high current superconducting DC power cable using the longitudinal magnetic field configuration

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AIP Conference Proceedings 2014年第1期1574卷 225-231页

作者： T. Matsushita V. S. Vyatkin M. Kiuchi E. S. Otabe Department of Computer Science and Electronics Kyushu Institute of Technology Iizuka 820-8502 JAPAN and Advanced Low Carbon Technology Research and Development Program Japan Science and Technology Agency Japan

It was shown that the current-carrying capacity of a superconducting DC power cable could be dramatically increased using the longitudinal magnetic field effect. That is, the force-free structure was assumed for the conductor in the cable to use a significant enhancement of the critical current density in a parallel magnetic field observed in metallic superconductors. However, the critical current density of present commercial coated conductors decreases slightly with increasing the longitudinal magnetic field. Hence, the fundamental design of the cable must be changed to obtain a higher current-carrying capacity. In spite of a poor critical current density in the longitudinal magnetic field, it is still appreciably higher than that in a transverse magnetic field. A new design is introduced for a superconducting DC power cable suitable for present coated conductors. It is shown that the current-carrying capacity can be remarkably increased from conventional cables.

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The Curved Surface Visualization of the Expert Behavior for Skill Transfer Using Microsoft Kinect

The Curved Surface Visualization of the Expert Behavior for ...

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International Conference on Informatics in Control, Automation and Robotics

作者： Kaoru Mitsuhashi Hiroshi Hashimoto Yasuhiro Ohyama School of Computer Science Tokyo University of Technology Master Program of Innovation for Design and Engineering Advanced Institute of Industrial Technology

ISBN: (纸本)9781479979202

Method of teaching and inheriting for skill is almost oral. It is not quantitative but qualitative. Quantitative inheriting of skill is difficult. In this paper, after tracking of a subject's skill motion using Microsoft Kinect, a subject's motion is visualized as the curved surface. A curved surface is fitted in the positions of a subject's joint, or the direction of trajectories. Expert and beginner perform swimming and karate motion. After the motions are tracked, the trajectories of joints are transformed to a curved surface. The difference of an action between an expert and a beginner is extracted by investigating curvatures and form on the visualized curved surface. Therefore, we expected that technical skill is transferred easily.

关键词： Skill Transfer Microsoft Kinect B-spline Curve Surface Visualization Gradient Curvature Distribution Tracking Motion Experts and Beginner

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Design and numerical analysis of surface plasmon-enhanced fin Ge-Si light-emitting diode

Design and numerical analysis of surface plasmon-enhanced fi...

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作者： Jeong, Intae Kwon, Jooseong Kim, Changsoon Park, Young June Program in Nano Science and Technology Graduate School of Convergence Science and Technology Seoul National University Seoul 151-742 Korea Republic of Department of Electrical and Computer Engineering School of Engineering Seoul National University Seoul 151-747 Korea Republic of Advanced Institutes of Convergence Technology Suwon Gyeonggi 443-270 Korea Republic of

Heavily-doped strained germanium (Ge) can emit light efficiently thanks to its pseudo direct band gap characteristic. This makes Ge a good candidate for on-chip monolithic light sources in silicon (Si) photonics systems. We propose fin-shaped Ge-Si heterojunction lightemitting diode (LED) with metal gates, which can enhance light emission by coupling with surface plasmon resonant modes and modulate light emission from the LED. We verify these two aspects through numerical analysis and device simulations. We develop the method to find the optimal device structure and specific device dimensions to maximize the spontaneous emission rate enhancement. Also we find that the LED can be modulated by a gate voltage bias. © 2014 Optical Society of America.

关键词： Surface plasmons

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Unobtrusive Monitoring of ECG-derived Features During Daily Smartphone Use

Unobtrusive Monitoring of ECG-derived Features During Daily ...

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Annual International Conference of the IEEE Engineering in Medicine and Biology Society

作者： Sungjun Kwon Seungwoo Kang Youngki Lee Chungkuk Yoo Kwangsuk Park Interdisciplinary Program of Bioengineering Seoul National University Department of Computer Science Korea Advanced Institute of Science and Technology (KAIST) Department of Information Systems at Singapore Management University Department of Biomedical Engineering College of Medicine Seoul National University

ISBN: (纸本)9781424479276

Heart rate variability (HRV) is known to be one of the representative ECG-derived features that are useful for diverse pervasive healthcare applications. The advancement in daily physiological monitoring technology is enabling monitoring of HRV in people's everyday lives. In this study, we evaluate the feasibility of measuring ECG-derived features such as HRV, only using the smartphone-integrated ECG sensors system named Sinabro. We conducted the evaluation with 13 subjects in five predetermined smartphone use cases. The result shows the potential that the smartphone-based sensing system can support daily monitoring of ECG-derived features;The average errors of HRV over all participants ranged from 1.65% to 5.83% (SD: 2.54～10.87) for five use cases. Also, all of individual HRV parameters showed less than 5% of average errors for the three reliable cases.

关键词： Power system stability Circuit stability Stability criteria Transient analysis Steady-state

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MASS CALIBRATION OF OPTICALLY SELECTED DES CLUSTERS USING A MEASUREMENT OF CMB-CLUSTER LENSING WITH SPTpol DATA

arXiv

引用

arXiv 2018年

作者： Raghunathan, S. Patil, S. Baxter, E. Benson, B.A. Bleem, L.E. Chou, T.L. Crawford, T.M. Holder, G.P. McClintock, T. Reichardt, C.L. Rozo, E. Varga, T.N. Abbott, T.M.C. Ade, P.A.R. Allam, S. Anderson, A.J. Annis, J. Austermann, J.E. Avila, S. Beall, J.A. Bechtol, K. Bender, A.N. Bernstein, G. Bertin, E. Bianchini, F. Brooks, D. Burke, D.L. Carlstrom, J.E. Carretero, J. Chang, C.L. Chiang, H.C. Cho, H.-M. Citron, R. Crites, A.T. Cunha, C.E. da Costa, L.N. Davis, C. Desai, S. Diehl, H.T. Dietrich, J.P. Dobbs, M.A. Doel, P. Eifler, T.F. Everett, W. Evrard, A.E. Flaugher, B. Fosalba, P. Frieman, J. Gallicchio, J. García-Bellido, J. Gaztanaga, E. George, E.M. Gilbert, A. Gruen, D. Gruendl, R.A. Gschwend, J. Gupta, N. Gutierrez, G. de Haan, T. Halverson, N.W. Harrington, N. Hartley, W.G. Henning, J.W. Hilton, G.C. Hollowood, D.L. Holzapfel, W.L. Honscheid, K. Hou, Z. Hoyle, B. Hrubes, J.D. Huang, N. Hubmayr, J. Irwin, K.D. James, D.J. Jeltema, T. Kim, A.G. Carrasco Kind, M. Knox, L. Kovacs, A. Kuehn, K. Kuropatkin, N. Lee, A.T. Li, T.S. Lima, M. Maia, M.A.G. Marshall, J.L. McMahon, J.J. Melchior, P. Menanteau, F. Meyer, S.S. Miller, C.J. Miquel, R. Mocanu, L. Montgomery, J. Nadolski, A. Natoli, T. Nibarger, J.P. Novosad, V. Padin, S. Plazas, A.A. Pryke, C. Rapetti, D. Romer, A.K. Carnero Rosell, A. Ruhl, J.E. Saliwanchik, B.R. Sanchez, E. Sayre, J.T. Scarpine, V. Schaffer, K.K. Schubnell, M. Serrano, S. Sevilla-Noarbe, I. Smecher, G. Smith, R.C. Soares-Santos, M. Sobreira, F. Stark, A.A. Story, K.T. Suchyta, E. Swanson, M.E.C. Tarle, G. Thomas, D. Tucker, C. Vanderlinde, K. de Vicente, J. Vieira, J.D. Wang, G. Whitehorn, N. Wu, W.L.K. Zhang, Y. School of Physics University of Melbourne ParkvilleVIC3010 Australia Department of Physics and Astronomy University of California Los AngelesCA90095 United States Department of Physics and Astronomy University of Pennsylvania PhiladelphiaPA19104 United States Fermi National Accelerator Laboratory MS209 P.O. Box 500 BataviaIL60510 United States Kavli Institute for Cosmological Physics University of Chicago 5640 South Ellis Avenue ChicagoIL60637 United States Department of Astronomy and Astrophysics University of Chicago 5640 South Ellis Avenue ChicagoIL60637 United States High Energy Physics Division Argonne National Laboratory 9700 S. Cass Avenue ArgonneIL60439 United States Department of Physics University of Chicago ChicagoIL60637 United States Department of Physics McGill University 3600 Rue University MontrealQCH3A 2T8 Canada Canadian Institute for Advanced Research CIFAR Program in Cosmology and Gravity TorontoONM5G 1Z8 Canada Department of Physics University of Arizona TucsonAZ85721 United States Max Planck Institute for Extraterrestrial Physics Giessenbachstrasse Garching85748 Germany Universitäts-Sternwarte Fakultät für Physik LudwigMaximilians Universität München Scheinerstr. 1 München81679 Germany Cerro Tololo Inter-American Observatory National Optical Astronomy Observatory Casilla 603 La Serena Chile Cardiff University CardiffCF10 3XQ United Kingdom Fermi National Accelerator Laboratory P. O. Box 500 BataviaIL60510 United States NIST Quantum Devices Group 325 Broadway Mailcode 817.03 BoulderCO80305 United States Institute of Cosmology & Gravitation University of Portsmouth PortsmouthPO1 3FX United Kingdom LSST 933 North Cherry Avenue TucsonAZ85721 United States CNRS UMR 7095 Institut d’Astrophysique de Paris ParisF-75014 France Sorbonne Universités UPMC Univ Paris 06 UMR 7095 Institut d’Astrophysique de Paris ParisF-75014 France Department of Physics & Astronomy University College London Gower

We use cosmic microwave background (CMB) temperature maps from the 500 deg2 SPTpol survey to measure the stacked lensing convergence of galaxy clusters from the Dark Energy Survey (DES) Year-3 redMaPPer (RM) cluster catalog. The lensing signal is extracted through a modified quadratic estimator designed to be unbiased by the thermal Sunyaev-Zel’dovich (tSZ) effect. The modified estimator uses a tSZ-free map, constructed from the SPTpol 95 and 150 GHz datasets, to estimate the background CMB gradient. For lensing reconstruction, we employ two versions of the RM catalog: a flux-limited sample containing 4003 clusters and a volume-limited sample with 1741 clusters. We detect lensing at a significance of 8.7σ(6.7σ) with the flux(volume)-limited sample. By modeling the reconstructed convergence using the Navarro-Frenk-White profile, we find the average lensing masses to be M200m = (1.62+0−0..3225 [stat.] ± 0.04 [sys.]) and (1.28+0−0..1418 [stat.] ± 0.03 [sys.]) ×1014 M☉ for the volume- and flux-limited samples respectively. The systematic error budget is much smaller than the statistical uncertainty and is dominated by the uncertainties in the RM cluster centroids. We use the volume-limited sample to calibrate the normalization of the mass-richness scaling relation, and find a result consistent with the galaxy weak-lensing measurements from DES (McClintock et al. 2018). Copyright © 2018, The Authors. All rights reserved.

关键词： Galaxies

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