3
3.0
Jun 30, 2018
06/18
Jun 30, 2018
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S. C. C. Barros; J. M. Almenara; M. Deleuil; R. F. Diaz; Sz Csizmadia; J. Cabrera; S. Chaintreuil; A. Collier Cameron; A. Hatzes; R. Haywood; A. F. Lanza; S. Aigrain; R. Alonso; R. Bordé; F. Bouchy; H. J. Deeg; A. Erikson; M. Fridlund; S. Grziwa; D. Gandolfi; T. Guillot; E. Guenther; A. Leger; C. Moutou; M. Ollivier; T. Pasternacki; M. Patzold; H. Rauer; D. Rouan; A. Santerne; J. Schneider; G. Wuchterl
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CoRoT-7b, the first super-Earth with measured radius discovered, has opened the new field of rocky exoplanets characterisation. To better understand this interesting system, new observations were taken with the CoRoT satellite. During this run 90 new transits were obtained in the imagette mode. These were analysed together with the previous 151 transits obtained in the discovery run and HARPS radial velocity observations to derive accurate system parameters. A difference is found in the...
Topics: Earth and Planetary Astrophysics, Astrophysics, Solar and Stellar Astrophysics
Source: http://arxiv.org/abs/1407.8099
5
5.0
Jun 30, 2018
06/18
Jun 30, 2018
by
Huy Nguyen; Hao Shi; Jie Xu; Shiwei Zhang
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We describe CPMC-Lab, a Matlab program for the constrained-path and phaseless auxiliary-field Monte Carlo methods. These methods have allowed applications ranging from the study of strongly correlated models, such as the Hubbard model, to ab initio calculations in molecules and solids. The present package implements the full ground-state constrained-path Monte Carlo (CPMC) method in Matlab with a graphical interface, using the Hubbard model as an example. The package can perform calculations in...
Topics: Strongly Correlated Electrons, Condensed Matter
Source: http://arxiv.org/abs/1407.7967
63
63
Jun 30, 2018
06/18
Jun 30, 2018
by
Yuancheng Fan; Fuli Zhang; Qian Zhao; Zeyong Wei; Hongqiang Li
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Coherent perfect absorber (CPA) was proposed as the time-reversed counterpart to laser: a resonator containing lossy medium instead of gain medium can absorb the coherent optical fields completely. Here, we exploit a monolayer graphene to realize the CPA in a non-resonant manner. It is found that quasi-CPA point exists in the terahertz regime for suspending monolayer graphene, and the CPA can be implemented with the assistant of proper phase modulation among two incident beams at the quasi-CPA...
Topics: Physics, Mesoscale and Nanoscale Physics, Optics, Materials Science, Condensed Matter
Source: http://arxiv.org/abs/1407.7961
5
5.0
Jun 30, 2018
06/18
Jun 30, 2018
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Hong-Viet V. Ngo; Jens Christian Claussen; Jan Born; Matthias Mölle
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Slow oscillations are electrical potential oscillations with a spectral peak frequency of $\sim$0.8 Hz, and hallmark the electroencephalogram during slow-wave sleep. Recent studies have indicated a causal contribution of slow oscillations to the consolidation of memories during slow-wave sleep, raising the question to what extent such oscillations can be induced by external stimulation. Here, we examined whether slow oscillations can be effectively induced by rhythmic acoustic stimulation....
Topics: Quantitative Biology, Neurons and Cognition
Source: http://arxiv.org/abs/1407.7999
5
5.0
Jun 30, 2018
06/18
Jun 30, 2018
by
J. S. Sanders; A. C. Fabian; J. Hlavacek-Larrondo; H. R. Russell; G. B. Taylor; F. Hofmann; G. Tremblay; S. A. Walker
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We present Chandra X-ray Observatory observations of the core of the galaxy cluster PKS 0745-191. Its centre shows X-ray cavities caused by AGN feedback and cold fronts with an associated spiral structure. The cavity energetics imply they are powerful enough to compensate for cooling. Despite the evidence for AGN feedback, the Chandra and XMM-RGS X-ray spectra are consistent with a few hundred solar masses per year cooling out of the X-ray phase, sufficient to power the emission line nebula....
Topics: Astrophysics of Galaxies, Astrophysics, Cosmology and Nongalactic Astrophysics
Source: http://arxiv.org/abs/1407.8008
9
9.0
Jun 30, 2018
06/18
Jun 30, 2018
by
Etele Molnar; Hannu Holopainen; Pasi Huovinen; Harri Niemi
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eye 9
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We explore the influence of a temperature-dependent shear viscosity over entropy density ratio $\eta/s$ on the azimuthal anisotropies v_2 and v_4 of hadrons at various rapidities. We find that in Au+Au collisions at full RHIC energy, $\sqrt{s_{NN}}=200$ GeV, the flow anisotropies are dominated by hadronic viscosity at all rapidities, whereas in Pb+Pb collisions at the LHC energy, $\sqrt{s_{NN}}=2760$ GeV, the flow coefficients are affected by the viscosity both in the plasma and hadronic phases...
Topics: High Energy Physics - Phenomenology, Nuclear Experiment, Nuclear Theory
Source: http://arxiv.org/abs/1407.8152
6
6.0
Jun 30, 2018
06/18
Jun 30, 2018
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LHCb collaboration; R. Aaij; B. Adeva; M. Adinolfi; A. Affolder; Z. Ajaltouni; S. Akar; J. Albrecht; F. Alessio; M. Alexander; S. Ali; K. Carvalho Akiba; G. Casse; L. Cassina; L. Castillo Garcia; M. Cattaneo; Ch. Cauet; R. Cenci; M. Charles; Ph. Charpentier; S. Chen; G. Alkhazov; S. -F. Cheung; N. Chiapolini; M. Chrzaszcz; K. Ciba; X. Cid Vidal; G. Ciezarek; P. E. L. Clarke; M. Clemencic; H. V. Cliff; J. Closier; P. Alvarez Cartelle; V. Coco; J. Cogan; E. Cogneras; P. Collins; A....
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An analysis of B0->D K*0 decays is presented, where D represents an admixture of D0 and D0b mesons reconstructed in four separate final states: K-pi+, pi-K+, K+K- and pi+pi-. The data sample corresponds to 3.0fb-1 of proton-proton collision, collected by the LHCb experiment. Measurements of several observables are performed, including CP asymmetries. The most precise determination is presented of rB(DK*0), the magnitude of the ratio of the amplitudes of the decay B0->D K+ pi- with a...
Topic: High Energy Physics - Experiment
Source: http://arxiv.org/abs/1407.8136
4
4.0
Jun 30, 2018
06/18
Jun 30, 2018
by
Johan Anderson; Hans Nordman; Raghvendra Singh
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The effects of second harmonics of the density and temperature perturbations on the linear Geodesic Acoustic Mode (GAM) frequency and non-linear generation of the GAM are investigated, using a fluid model. We show that the second harmonics contribute to the frequency through the density gradient scale length and the wave number of the GAM. In addition, the linear frequency of the GAM is generally increased by coupling to the higher harmonic.
Topics: Physics, Plasma Physics
Source: http://arxiv.org/abs/1407.8037
3
3.0
Jun 30, 2018
06/18
Jun 30, 2018
by
E. Nicklas; W. Muessel; H. Strobel; P. G. Kevrekidis; M. K. Oberthaler
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The dynamical evolution of spatial patterns in a complex system can reveal the underlying structure and stability of stationary states. As a model system we employ a two-component rubidium Bose-Einstein condensate at the transition from miscible to immiscible with the additional control of linear interconversion. Excellent agreement is found between the detailed experimental time evolution and the corresponding numerical mean-field computations. Analyzing the dynamics of the system, we find...
Topics: Quantum Gases, Nonlinear Sciences, Pattern Formation and Solitons, Condensed Matter
Source: http://arxiv.org/abs/1407.8049
4
4.0
Jun 30, 2018
06/18
Jun 30, 2018
by
Chia-Yu Hsieh; YunKyong Hyon; Hijin Lee; Tai-Chia Lin; Chun Liu
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In order to describe the dynamics of crowded ions (charged particles), we use an energetic variation approach to derive a modified Poisson-Nernst-Planck (PNP) system which includes an extra dissipation due to the effective velocity differences between ion species. Such a system is more complicated than the original PNP system but with the same equilibrium states. Using Schauder's fixed-point theorem, we develop a local existence theorem of classical solutions for the modified PNP system....
Topics: Mathematics, Analysis of PDEs, Mathematical Physics
Source: http://arxiv.org/abs/1407.8245
5
5.0
Jun 30, 2018
06/18
Jun 30, 2018
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Haris Aziz; Markus Brill; Vincent Conitzer; Edith Elkind; Rupert Freeman; Toby Walsh
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eye 5
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We consider approval-based committee voting, i.e. the setting where each voter approves a subset of candidates, and these votes are then used to select a fixed-size set of winners (committee). We propose a natural axiom for this setting, which we call justified representation (JR). This axiom requires that if a large enough group of voters exhibits agreement by supporting the same candidate, then at least one voter in this group has an approved candidate in the winning committee. We show that...
Topics: Computer Science and Game Theory, Multiagent Systems, Computing Research Repository
Source: http://arxiv.org/abs/1407.8269
4
4.0
Jun 30, 2018
06/18
Jun 30, 2018
by
H. Nikolic
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In the literature one often finds the claim that there is no such thing as an energy-momentum tensor for the gravitational field, and consequently, that the total energy-momentum conservation can only be defined in terms of a gravitational energy-momentum pseudo-tensor. Nevertheless, by relaxing the assumption that gravitational energy-momentum tensor should only depend on first derivatives of the metric, the Einstein equation leads to a trivial result that gravitational energy-momentum tensor...
Topic: General Relativity and Quantum Cosmology
Source: http://arxiv.org/abs/1407.8028
6
6.0
Jun 30, 2018
06/18
Jun 30, 2018
by
Wan-Li Ju; Guo-Li Wang; Hui-Feng Fu; Zhi-Hui Wang; Ying Li
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eye 6
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The rare processes $B_c\to D_{(s)J} ^{(*)}\mu\bar{\mu}$, where $D_{(s)J}^{(*)}$ stands for the final meson $D_{s0}^*(2317)$, $D_{s1}(2460,2536)$,~$D_{s2}^*(2573)$, $D_0^*(2400)$, $D_{1}(2420,2430)$ or~$D_{2}^*(2460)$, are studied within the Standard Model. The hadronic matrix elements are evaluated in the Bethe-Salpeter approach and furthermore a discussion on the gauge-invariant condition of the annihilation hadronic currents is presented. Considering the penguin, box, annihilation,...
Topic: High Energy Physics - Phenomenology
Source: http://arxiv.org/abs/1407.7968
5
5.0
Jun 30, 2018
06/18
Jun 30, 2018
by
Christoph Baranec; Reed Riddle; Nicholas M. Law; A. N. Ramaprakash; Shriharsh Tendulkar; Kristina Hogstrom; Khanh Bui; Mahesh Burse; Pravin Chordia; Hillol Das; Richard Dekany; Shrinivas Kulkarni; Sujit Punnadi
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eye 5
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As new large-scale astronomical surveys greatly increase the number of objects targeted and discoveries made, the requirement for efficient follow-up observations is crucial. Adaptive optics imaging, which compensates for the image-blurring effects of Earth's turbulent atmosphere, is essential for these surveys, but the scarcity, complexity and high demand of current systems limits their availability for following up large numbers of targets. To address this need, we have engineered and...
Topics: Instrumentation and Methods for Astrophysics, Astrophysics
Source: http://arxiv.org/abs/1407.8179
3
3.0
Jun 30, 2018
06/18
Jun 30, 2018
by
Yun-Fei Yang; Hui-Xue Qu; Kai-Fan Ji; Song Feng; Hui Deng; Jia-Ben Lin; Feng Wang
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eye 3
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We study the motions of G band bright points (GBPs) in the quiet Sun to obtain the characteristics of different motion types. A high resolution image sequence taken with the Hinode/Solar Optical Telescope (SOT) is used, and GBPs are automatically tracked by segmenting 3D evolutional structures in a space time cube. After putting the GBPs that do not move during their lifetimes aside, the non stationary GBPs are categorized into three types based on an index of motion type. Most GBPs that move...
Topics: Astrophysics, Solar and Stellar Astrophysics
Source: http://arxiv.org/abs/1407.7958
8
8.0
Jun 30, 2018
06/18
Jun 30, 2018
by
Hilding R. Neilson; Alexandra C. Bisol; Ed Guinan; Scott Engle
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eye 8
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Measurements of secular period change probe real-time stellar evolution of classical Cepheids making these measurements powerful constraints for stellar evolution models, especially when coupled with interferometric measurements. In this work, we present stellar evolution models and measured rates of period change for two Galactic Cepheids: Polaris and l Carinae, both important Cepheids for anchoring the Cepheid Leavitt law (period-luminosity relation). The combination of previously-measured...
Topics: Astrophysics, Solar and Stellar Astrophysics
Source: http://arxiv.org/abs/1407.8098
8
8.0
Jun 30, 2018
06/18
Jun 30, 2018
by
Hua Zhou; John Blangero; Thomas D. Dyer; Kei-hang K. Chan; Kenneth Lange; Eric M. Sobel
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eye 8
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Since most analysis software for genome-wide association studies (GWAS) currently exploit only unrelated individuals, there is a need for efficient applications that can handle general pedigree data or mixtures of both population and pedigree data. Even data sets thought to consist of only unrelated individuals may include cryptic relationships that can lead to false positives if not discovered and controlled for. In addition, family designs possess compelling advantages. They are better...
Topics: Applications, Computation, Quantitative Biology, Statistics, Genomics, Populations and Evolution
Source: http://arxiv.org/abs/1407.8253
4
4.0
Jun 30, 2018
06/18
Jun 30, 2018
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Diogo A. Gomes; Hiroyoshi Mitake
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eye 4
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In this paper, we investigate the existence and uniqueness of solutions to a stationary mean field game model introduced by J.-M. Lasry and P.-L. Lions. This model features a quadratic Hamiltonian with possibly singular congestion effects. Thanks to a new class of a-priori bounds, combined with the continuation method, we prove the existence of smooth solutions in arbitrary dimensions.
Topics: Mathematics, Analysis of PDEs
Source: http://arxiv.org/abs/1407.8267
4
4.0
Jun 30, 2018
06/18
Jun 30, 2018
by
Hoai-Minh Nguyen
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eye 4
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This paper is devoted to the study of cloaking via anomalous localized resonance (CALR) in the two and three dimensional quasistatic regimes. CALR associated with negative index materials was discovered by Milton and Nicorovicci in [21] and attracted a lot attention in the scientific community. Two key figures of this phenomenon are the localized resonance, i.e., the fields blow up in some regions and remain bounded in some others, and the connection between the localized resonance and the blow...
Topics: Mathematics, Analysis of PDEs
Source: http://arxiv.org/abs/1407.7977
4
4.0
Jun 30, 2018
06/18
Jun 30, 2018
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Jige Chen; Yi Gao; Chunlei Wang; Renliang Zhang; Hong Zhao; Haiping Fang
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eye 4
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Thermally driven nanotube nanomotors provide linear mass transportation controlled by a temperature gradient. However, the underlying mechanism is still unclear where the mass transportation velocity in experiment is much lower than that resulting from simulations. Considering that defects are common in fabricated nanotubes, we use molecular dynamics simulations to show that the mass transportation would be considerably impeded by the potential barriers or wells induced by the defects, which...
Topics: Mesoscale and Nanoscale Physics, Statistical Mechanics, Condensed Matter
Source: http://arxiv.org/abs/1407.8263
4
4.0
Jun 30, 2018
06/18
Jun 30, 2018
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Zhihao Bian; Hao Qin; Xiang Zhan; Rong Zhang; Peng Xue
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We implement a quantum walk in phase space with a new mechanism based on the superconducting resonator-assisted double quantum dots. By analyzing the hybrid system, we obtain the necessary factors of realization of a quantum walk in phase space: the walker, coin, coin flipping and conditional phase shift. In order to implement the coin flipping operator, we add a driving field to the resonator. The interaction between the quantum dots and resonator field is used to implement conditional phase...
Topic: Quantum Physics
Source: http://arxiv.org/abs/1407.8148
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9.0
Jun 30, 2018
06/18
Jun 30, 2018
by
Luis A. Anchordoqui; Ignatios Antoniadis; De-Chang Dai; Wan-Zhe Feng; Haim Goldberg; Xing Huang; Dieter Lust; Dejan Stojkovic; Tomasz R. Taylor
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eye 9
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[Abridged] We consider extensions of the standard model based on open strings ending on D-branes. Assuming that the fundamental string mass scale M_s is in the TeV range and that the theory is weakly coupled, we discuss possible signals of string physics at the upcoming HL-LHC run (3000 fb^{-1}) with \sqrt{s} = 14 TeV, and at potential future pp colliders, HE-LHC and VLHC, operating at \sqrt{s} = 33 and 100 TeV, respectively. In such D-brane constructions, the dominant contributions to...
Topics: High Energy Physics - Theory, High Energy Physics - Phenomenology
Source: http://arxiv.org/abs/1407.8120
4
4.0
Jun 30, 2018
06/18
Jun 30, 2018
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Stanley J. Brodsky; Guy F. de Teramond; Hans Gunter Dosch; Joshua Erlich
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In this report we explore the remarkable connections between light-front dynamics, its holographic mapping to gravity in a higher-dimensional anti-de Sitter (AdS) space, and conformal quantum mechanics. This approach provides new insights into the origin of a fundamental mass scale and the physics underlying confinement dynamics in QCD in the limit of massless quarks. The result is a relativistic light-front wave equation for arbitrary spin with an effective confinement potential derived from a...
Topics: High Energy Physics - Theory, High Energy Physics - Phenomenology
Source: http://arxiv.org/abs/1407.8131
5
5.0
Jun 30, 2018
06/18
Jun 30, 2018
by
H. Zhu; W. W. Tian; P. Zuo
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We study Gamma-ray supernova remnant W49B and its environment using recent radio and infrared data. {\it Spitzer} IRS low resolution data of W49B shows shocked excitation lines of H$_{2}$ (0,0) S(0)-S(7) from the SNR-molecular cloud interaction. The H$_2$ gas is composed of two components with temperature of $\sim$260 K and $\sim$1060 K respectively. Various spectral lines from atomic and ionic particles are detected towards W49B. We suggest the ionic phase has an electron density of $\sim$500...
Topics: High Energy Astrophysical Phenomena, Astrophysics, Solar and Stellar Astrophysics
Source: http://arxiv.org/abs/1407.8260
3
3.0
Jun 30, 2018
06/18
Jun 30, 2018
by
Chan-Kao Chang; Adam Waszczak; Hsing-Wen Lin; Wing-Huen Ip; Thomas. A. Prince; Shrinivas R. Kulkarni; Russ Laher; Jason Surace
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eye 3
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Asteroids of size larger than 150 m generally do not have rotation periods smaller than 2.2 hours. This spin cutoff is believed to be due to the gravitationally bound rubble-pile structures of the asteroids. Rotation with periods exceeding this critical value will cause asteroid breakup. Up until now, only one object, 2001 OE84, has been found to be an exception to this spin cutoff. We report the discovery of a new super-fast rotator, (335433) 2005 UW163, spinning with a period of 1.290 hours...
Topics: Earth and Planetary Astrophysics, Astrophysics
Source: http://arxiv.org/abs/1407.8264
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7.0
Jun 30, 2018
06/18
Jun 30, 2018
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Christopher B. Johnson; R. I. Hynes; T. Maccarone; C T. Britt; H. Davis; P. G. Jonker; M. A. P. Torres; D. Steeghs; S. Greiss; G. Nelemans
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eye 7
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We present the results of a spectroscopic and photometric analysis of HD314884, a slowly pulsating B star (SPB) in a binary system with detected soft X-ray emission. We spectrally classify the B star as a B5V-B6V star with T$_{eff}$ = 15,490 $\pm$ 310 K, log $g$ = 3.75 $\pm$ 0.25 dex, and a photometric period of P$_{0}$ = 0.889521(12) days. A spectroscopic period search reveals an orbital period for the system of P$_{orb}$ = 1.3654(11) days. The discrepancy in the two periods and the...
Topics: Astrophysics, Solar and Stellar Astrophysics
Source: http://arxiv.org/abs/1407.7938
6
6.0
Jun 30, 2018
06/18
Jun 30, 2018
by
P. Popesso; A. Biviano; A. Finoguenov; D. Wilman; M. Salvato; B. Magnelli; C. Gruppioni; F. Pozzi; G. Rodighiero; F. Ziparo; S. Berta; D. Elbaz; M. Dickinson; D. Lutz; B. Altieri; H. Aussel; A. Cimatti; D. Fadda; O. Ilbert; E. Le Floch; R. Nordon; A. Poglitsch; S. Genel; C. K. Xu
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eye 6
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The most striking feature of the Cosmic Star Formation History (CSFH) of the Universe is a dramatic drop of the star formation (SF) activity, since z~1. In this work we investigate if the very same process of assembly and growth of structures is one of the major drivers of the observed decline. We study the contribution to the CSFH of galaxies in halos of different masses. This is done by studying the total SFR-halo mass-redshift plane from redshift 0 to redshift z~1.6 in a sample of 57 groups...
Topics: Astrophysics of Galaxies, Astrophysics
Source: http://arxiv.org/abs/1407.8231
3
3.0
Jun 30, 2018
06/18
Jun 30, 2018
by
P. Popesso; A. Biviano; A. Finoguenov; D. Wilman; M. Salvato; B. Magnelli; C. Gruppioni; F. Pozzi; G. Rodighiero; F. Ziparo; S. Berta; D. Elbaz; M. Dickinson; D. Lutz; B. Altieri; H. Aussel; A. Cimatti; D. Fadda; O. Ilbert; E. Le Floch; R. Nordon; A. Poglitsch; C. K. Xu
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eye 3
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There is now a large consensus that the current epoch of the Cosmic Star Formation History (CSFH) is dominated by low mass galaxies while the most active phase at 1~1, the most IR-luminous galaxies (LIRGs and ULIRGs) are preferentially located in groups, and this is consistent with a reversal of the star-formation rate vs .density anti-correlation observed in the nearby Universe. At these redshifts, group galaxies contribute 60-80% of the CSFH, i.e. much more than at lower redshifts. Below z~1,...
Topics: Astrophysics of Galaxies, Astrophysics, Cosmology and Nongalactic Astrophysics
Source: http://arxiv.org/abs/1407.8214
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27
Jun 30, 2018
06/18
Jun 30, 2018
by
Hua Zhou; Jin Zhou; Tao Hu; Eric M Sobel; Kenneth Lange
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Pedigree GWAS (Option 29) in the current version of the Mendel software is an optimized subroutine for performing large scale genome-wide QTL analysis. This analysis (a) works for random sample data, pedigree data, or a mix of both, (b) is highly efficient in both run time and memory requirement, (c) accommodates both univariate and multivariate traits, (d) works for autosomal and x-linked loci, (e) correctly deals with missing data in traits, covariates, and genotypes, (f) allows for covariate...
Topics: Populations and Evolution, Applications, Quantitative Biology, Statistics, Genomics
Source: http://arxiv.org/abs/1407.8259
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12
Jun 30, 2018
06/18
Jun 30, 2018
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G. A. Beer; Y. Fujiwara; S. Hirota; K. Ishida; M. Iwasaki; S. Kanda; H. Kawai; N. Kawamura; R. Kitamura; S. Lee; W. Lee G. M. Marshall; T. Mibe; Y. Miyake; S. Okada; K. Olchanski; A. Olin; Y. Oishi; H. Onishi; M. Otani; N. Saito; K. Shimomura; P. Strasser; M. Tabata; D. Tomono; K. Ueno; K. Yokoyama; E. Won
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eye 12
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Emission of muonium ($\mu^+e^-$) atoms from a laser-processed aerogel surface into vacuum was studied for the first time. Laser ablation was used to create hole-like regions with diameter of about 270$~\mu$m in a triangular pattern with hole separation in the range of 300--500$~\mu$m. The emission probability for the laser-processed aerogel sample is at least eight times higher than for a uniform one.
Topics: Physics, High Energy Physics - Experiment, Atomic Physics, Instrumentation and Detectors
Source: http://arxiv.org/abs/1407.8248
5
5.0
Jun 30, 2018
06/18
Jun 30, 2018
by
A. Skopal; H. Drechsel; T. N. Tarasova; T. Kato; M. Fujii; F. Teyssier; O. Garde; J. Guarro; J. Edlin; C. Buil; D. Antao; J. N. Terry; T. Lemoult; S. Charbonnel; T. Bohlsen; A. Favaro; K. Graham
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eye 5
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We determine the temporal evolution of the luminosity L(WD), radius R(WD) and effective temperature Teff of the white dwarf (WD) pseudophotosphere of V339 Del from its discovery to around day 40. Another main objective was studying the ionization structure of the ejecta. These aims were achieved by modelling the optical/near-IR spectral energy distribution (SED) using low-resolution spectroscopy (3500 - 9200 A), UBVRcIc and JHKLM photometry. During the fireball stage (Aug. 14.8 - 19.9, 2013),...
Topics: Astrophysics, Solar and Stellar Astrophysics
Source: http://arxiv.org/abs/1407.8212
6
6.0
Jun 30, 2018
06/18
Jun 30, 2018
by
Yan-Lin Tang; Hua-Lei Yin; Si-Jing Chen; Yang Liu; Wei-Jun Zhang; Xiao Jiang; Lu Zhang; Jian Wang; Li-Xing You; Jian-Yu Guan; Dong-Xu Yang; Zhen Wang; Hao Liang; Zhen Zhang; Nan Zhou; Xiongfeng Ma; Teng-Yun Chen; Qiang Zhang; Jian-Wei Pan
texts
eye 6
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Measurement-device-independent quantum key distribution (MDIQKD) protocol is immune to all attacks on detection and guarantees the information-theoretical security even with imperfect single photon detectors. Recently, several proof-of-principle demonstrations of MDIQKD have been achieved. Those experiments, although novel, are implemented through limited distance with a key rate less than 0.1 bps. Here, by developing a 75 MHz clock rate fully-automatic and highly-stable system, and...
Topic: Quantum Physics
Source: http://arxiv.org/abs/1407.8012
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21
Jun 30, 2018
06/18
Jun 30, 2018
by
Zenan Qi; Harold S. Park; David K. Campbell
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eye 21
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Graphene's exceptional mechanical properties, including its highest-known stiffness (1 TPa) and strength (100 GPa) have been exploited for various structural applications. However, graphene is also known to be quite brittle, with experimentally-measured tensile fracture strains that do not exceed a few percent. In this work, we introduce the notion of graphene kirigami, where concepts that have been used almost exclusively for macroscale structures are applied to dramatically enhance the...
Topics: Physics, Computational Physics, Materials Science, Condensed Matter
Source: http://arxiv.org/abs/1407.8113
4
4.0
Jun 30, 2018
06/18
Jun 30, 2018
by
Friedrich Knop; Bernhard Krötz; Eitan Sayag; Henrik Schlichtkrull
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eye 4
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We apply the local structure theorem and the polar decomposition to a real spherical space Z=G/H and control the volume growth on Z. We define the Harish-Chandra Schwartz space on Z. We give a geometric criterion to ensure $L^p$-integrability of matrix coefficients on Z.
Topics: Mathematics, Representation Theory
Source: http://arxiv.org/abs/1407.8006
3
3.0
Jun 30, 2018
06/18
Jun 30, 2018
by
Hari K. Kunduri; James Lucietti
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eye 3
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The domain of outer communication of five-dimensional asymptotically flat stationary spacetimes may possess non-trivial 2-cycles. We discuss how this may lead to a gross violation of black hole uniqueness, beyond the existence of black rings, even for solutions with two commuting rotational symmetries. We illustrate this with a simple example in minimal supergravity; a four parameter family of supersymmetric black hole solutions, with spherical horizon topology and a 2-cycle in the exterior. We...
Topics: High Energy Physics - Theory, General Relativity and Quantum Cosmology
Source: http://arxiv.org/abs/1407.8002
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8.0
Jun 30, 2018
06/18
Jun 30, 2018
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Thorsten Renk; Rupa Chatterjee; Kari J. Eskola; Harri Niemi; Ilkka Helenius
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One of the unsolved problems in the current 'standard model' of heavy ion physics is the apparent rapid thermalization of QCD matter in the pre-equilibrium stage. While it is challenging to probe this mechanism directly, there are now several observables available which allow tomographic imaging of the initial state geometry, which is expected to carry remnant information of the equilibration mechanism. On the fluid dynamics side, scaled fluctuations in the momentum space anisotropy parameters...
Topics: High Energy Physics - Phenomenology, Nuclear Theory
Source: http://arxiv.org/abs/1407.7954
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9.0
Jun 30, 2018
06/18
Jun 30, 2018
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M. Guedel; R. Dvorak; N. Erkaev; J. Kasting; M. Khodachenko; H. Lammer; E. Pilat-Lohinger; H. Rauer; I. Ribas; B. E. Wood
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With the discovery of hundreds of exoplanets and a potentially huge number of Earth-like planets waiting to be discovered, the conditions for their habitability have become a focal point in exoplanetary research. The classical picture of habitable zones primarily relies on the stellar flux allowing liquid water to exist on the surface of an Earth-like planet with a suitable atmosphere. However, numerous further stellar and planetary properties constrain habitability. Apart from...
Topics: Earth and Planetary Astrophysics, Astrophysics, Solar and Stellar Astrophysics
Source: http://arxiv.org/abs/1407.8174
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7.0
Jun 30, 2018
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Jun 30, 2018
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Henryk Czyz; Johann H. Kuhn; Szymon Tracz
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New parametrisation for the electric and the magnetic form factors of proton and neutron are presented. The proton form factors describe well the recent measurements by BaBar collaboration and earlier ones of the ratio of the form factors in space-like region. The neutron form factors are consistent with earlier measurements of neutron pair production and ratio of the form factors in the space-like region. These form factors are implemented into the generator PHOKHARA, which simulates the...
Topic: High Energy Physics - Phenomenology
Source: http://arxiv.org/abs/1407.7995
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6.0
Jun 30, 2018
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Jun 30, 2018
by
Rui Han; Hui Khoon Ng; Berthold-Georg Englert
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One can implement fast two-qubit entangling gates by exploiting the Rydberg blockade. Although various theoretical schemes have been proposed, experimenters have not yet been able to demonstrate two-atom gates of high fidelity due to experimental constraints. We propose a novel scheme, which only uses a single Rydberg pulse illuminating both atoms, for the construction of neutral-atom controlled-phase gates. In contrast to the existing schemes, our approach is simpler to implement and requires...
Topic: Quantum Physics
Source: http://arxiv.org/abs/1407.8051
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3.0
Jun 30, 2018
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Jun 30, 2018
by
Holger Gies; René Sondenheimer
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We study a chiral Yukawa model mimicking the Higgs-top-bottom sector of the standard model. We re-analyze the conventional arguments that relate a lower bound for the Higgs mass with vacuum stability in the light of exact results for the regularized fermion determinant as well as in the framework of the functional renormalization group. In both cases, we find no indication for vacuum instability nor meta-stability induced by top-fluctuations if the cutoff is kept finite but arbitrary. A lower...
Topics: High Energy Physics - Theory, High Energy Physics - Phenomenology
Source: http://arxiv.org/abs/1407.8124
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5.0
Jun 30, 2018
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Jun 30, 2018
by
Meysam Alishahi; Hossein Hajiabolhassan
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For a graph $G$, the tree graph ${\cal T}_{G,t}$ has all tree subgraphs of $G$ with $t$ vertices as vertex set and two tree subgraphs are neighbors if they are edge-disjoint. Also, the $r^{th}$ cut number of $G$ is the minimum number of edges between parts of a partition of vertex set of $G$ into two parts such that each part has size at least $r$. We show that if $t=(1-o(1))n$ and $n$ is large enough, then for any dense graph $G$ with $n$ vertices, the chromatic number of the tree graph ${\cal...
Topics: Mathematics, Combinatorics
Source: http://arxiv.org/abs/1407.8035
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Oct 14, 2014
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Oct 14, 2014
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Horimoto, Yoshiya; Arakawa, Atsushi; Tanabe, Masahiko; Sonoue, Hiroshi; Igari, Fumie; Senuma, Koji; Tokuda, Emi; Shimizu, Hideo; Kosaka, Taijiro; Saito, Mitsue
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This article is from BMC Cancer , volume 14 . Abstract Background: Patients with luminal HER2-negative tumours have a favourable prognosis. However, there is a subpopulation in which poorer outcomes are obtained with endocrine therapy alone. This subpopulation is considered to benefit from chemotherapy. However, the significance of chemotherapy for those with luminal tumours has decreased due to recent changes in treatment strategies. Thus, it is often difficult to determine whether we should...
Source: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4124146
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Oct 12, 2014
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Oct 12, 2014
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Mehrabadi, Azar; Liu, Shiliang; Bartholomew, Sharon; Hutcheon, Jennifer A; Magee, Laura A; Kramer, Michael S; Liston, Robert M; Joseph, K S
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This article is from BMJ : British Medical Journal , volume 349 . Abstract Objective To examine whether changes in postpartum haemorrhage, hypertensive disorders of pregnancy, or other risk factors explain the increase in obstetric acute renal failure in Canada.Design Retrospective cohort study.Setting Canada (excluding the province of Quebec).Participants All hospital deliveries from 2003 to 2010 (n=2 193 425).Main outcome measures Obstetric acute renal failure identified by ICD-10...
Source: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4115671
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Oct 12, 2014
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Oct 12, 2014
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Xavier, Basil Britto; Sabirova, Julia; Pieter, Moons; Hernalsteens, Jean-Pierre; de Greve, Henri; Goossens, Herman; Malhotra-Kumar, Surbhi
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This article is from BMC Research Notes , volume 7 . Abstract Background: De novo genome assembly can be challenging due to inherent properties of the reads, even when using current state-of-the-art assembly tools based on de Bruijn graphs. Often users are not bio-informaticians and, in a black box approach, utilise assembly parameters such as contig length and N50 to generate whole genome sequences, potentially resulting in mis-assemblies. Findings: Utilising several assembly tools based on de...
Source: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4118782
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50
Oct 12, 2014
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Oct 12, 2014
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Chen, Hongfei; Xia, Yun; Zhu, Binbin; Hu, Xiawei; Xu, Shihao; Chen, Limei; Papadimos, Thomas J; Wang, Wantie; Wang, Quanguang; Xu, Xuzhong
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This article is from BMC Anesthesiology , volume 14 . Abstract Background: The reversal efficacy of 2% lipid emulsion in cardiac asystole induced by different concentrations of bupivacaine is poorly defined and needs to be determined. Methods: Forty-two male Sprague–Dawley rats were randomly divided into seven groups: B40, B60, B80, B100, B120, B140 and B160, n = 6. The Langendorff isolated heart perfusion model was used, which consisted of a balanced perfusion with Krebs-Henseleit...
Source: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4118607
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Oct 11, 2014
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Oct 11, 2014
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Melville, Jane; Smith, Katie; Hobson, Rod; Hunjan, Sumitha; Shoo, Luke
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This article is from PLoS ONE , volume 9 . Abstract Molecular phylogenetics is increasingly highlighting the prevalence of cryptic species, where morphologically similar organisms have long independent evolutionary histories. When such cryptic species are known to be declining in numbers and are at risk of extinction due to a range of threatening processes, the disjunction between molecular systematics research and conservation policy becomes a significant problem. We investigate the taxonomic...
Source: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4116116
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Oct 11, 2014
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Oct 11, 2014
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Regan, Fran H.; Hockenhull, Jo; Pritchard, Joy C.; Waterman-Pearson, Avril E.; Whay, Helen R.
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This article is from PLoS ONE , volume 9 . Abstract Background: The donkey has a reputation for stoicism and its behavioural repertoire in clinical contexts is under-reported. Lack of understanding of the norms of donkey behaviour and how it may vary over time can compromise use of behavioural measures as indicators of pain or emotional state. The objective of this study was to find out whether the behaviour of working donkeys was influenced by gender, the time of day or differed between days...
Source: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4116118
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Oct 11, 2014
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Oct 11, 2014
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Harper, Diane M.; Else, Britney M.; Bartley, Mitchell J.; Arey, Anne M.; Barnett, Angela L.; Rosemergey, Beth E.; Paynter, Christopher A.; Verdenius, Inge; Harper, Sean M.; Harris, George D.; Groner, Jennifer A.; Malnar, Gerard J.; Wall, Jeffrey; Bonham, Aaron J.
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This article is from PLoS ONE , volume 9 . Abstract Objectives: Obesity adversely inhibits antibody response to vaccination. Three doses of HPV4 may or may not provide adequate long term protection against HPV 16/18 in obese females. The aim of this study was to determine whether adherence to HPV4 vaccination in a safety net population was reduced with increasing body mass index (BMI). Methods: We designed a historical prospective study evaluating the number and dates of HPV4 dosing that...
Source: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4116139
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Oct 11, 2014
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Oct 11, 2014
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Nagy, Alexander; Cernikova, Lenka; Jirincova, Helena; Havlickova, Martina; Hornickova, Jitka
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This article is from PLoS ONE , volume 9 . Abstract Influenza A virus (IAV) in wild bird reservoir hosts is characterized by the perpetuation in a plethora of subtype and genotype constellations. Multiyear monitoring studies carried out during the last two decades worldwide have provided a large body of knowledge regarding the ecology of IAV in wild birds. Nevertheless, other issues of avian IAV evolution have not been fully elucidated, such as the complexity and dynamics of genetic...
Source: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4116140
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Oct 11, 2014
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Oct 11, 2014
by
Ullal-Gupta, Sangeeta; Hannon, Erin E.; Snyder, Joel S.
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This article is from PLoS ONE , volume 9 . Abstract Musical meters vary considerably across cultures, yet relatively little is known about how culture-specific experience influences metrical processing. In Experiment 1, we compared American and Indian listeners' synchronous tapping to slow sequences. Inter-tone intervals contained silence or to-be-ignored rhythms that were designed to induce a simple meter (familiar to Americans and Indians) or a complex meter (familiar only to Indians). A...
Source: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4116158
