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2016-09-29
08:00
A minimal model for spontaneous cell polarization and edge activity in oscillating, rotating and migrating cells / Raynaud, Franck ; Ambuhl, Mark E ; Gabella, Chiara ; Bornert, Alicia ; Sbalzarini, Ivo F ; Meister, Jean-Jacques ; Verkhovsky, Alexander B
How the cells break symmetry and organize their edge activity to move directionally is a fun- damental question in cell biology. Physical models of cell motility commonly rely on gradients of regulatory factors and/or feedback from the motion itself to describe polarization of edge activity. [...]
arXiv:1609.09006.- 2016 - 8 p. - Published in : Nature Phys. 12 (2016) 367 External link: Preprint

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2016-09-29
08:00
Modeling generic aspects of ideal fibril formation / Michel, Denis
Many different proteins self-aggregate into insoluble fibrils growing apically by reversible addition of elementary building blocks. But beyond this common principle, the modalities of fibril formation are very disparate, with various intermediate forms which can be reshuffled by minor modifications of physico-chemical conditions or amino-acid sequences. [...]
arXiv:1609.09005.- 2016 - 14 p. - Published in : J. Chem. Phys. 144 (2016) 035101 External link: Preprint

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2016-09-29
08:00
Light propagation in tunable exciton-polariton one-dimensional photonic crystals / Sedov, E S ; Cherotchenko, E D ; Arakelian, S M ; Kavokin, A V
Simulations of propagation of light beams in specially designed multilayer semiconductor structures (one-dimensional photonic crystals) with embedded quantum wells reveal characteristic optical properties of resonant hyperbolic metamaterials. A strong dependence of the refraction angle and the optical beam spread on the exciton radiative lifetime is revealed. [...]
arXiv:1609.08982.- 2016 - Published in : Phys. Rev. B 94 (2016) 125309 External link: Preprint

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2016-09-29
08:00
Emergence of global scaling behaviour in the coupled Earth-atmosphere interaction / Fallah, Bijan ; Saberi, Abbas Ali ; Sodoudi, Sahar
Scale invariance property in the global geometry of Earth may lead to a coupled interactive behaviour between various components of the climate system. One of the most interesting correlations exists between spatial statistics of the global topography and the temperature on Earth. [...]
arXiv:1609.08926.- 2016 - 8 p. - Published in : Scientific Reports 6, Article number: 34005 (2016) External link: Preprint

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2016-09-29
08:00
Dynamically creating tripartite resonance and dark modes in a multimode optomechanical system / Damskägg, E ; Pirkkalainen, J -M ; Sillanpää, M A
We study a multimode optomechanical system where two mechanical oscillators are coupled to an electromagnetic cavity. Previously it has been shown that if the mechanical resonances have nearly equal frequencies, one can make the oscillators to interact via the cavity by strong pumping with a coherent pump tone. [...]
arXiv:1609.08809.- 2016 - 7 p. - Published in : J. Opt. 18 (2016) 104003 External link: Preprint

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2016-09-29
07:57
Metropolis updates for Diagrammatic Monte-Carlo algorithms from Schwinger-Dyson equations / Buividovich, P V
We describe a general recipe for constructing Metropolis updates for Diagrammatic Monte-Carlo (DiagMC) algorithms, based on the Schwinger-Dyson equations in quantum field theory. This approach bypasses explicit duality transformations, enumeration or classification of diagrams and can be used for lattice quantum field theories with unknown or complicated dual representations (such as non-Abelian lattice gauge theories). [...]
arXiv:1609.08833.- 2016 - 7 p. External link: Preprint

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2016-09-29
07:53
The Influence of Coronal Mass Ejections on the Gas Dynamics of the Atmosphere of a "Hot~Jupiter" Exoplanet / Bisikalo, D V ; Cherenkov, A A
The results of three-dimensional numerical simulations of the gas dynamics of the atmosphere of a "hot Jupiter" exoplanet during the passage of a coronal mass ejection (CME) from the central star are presented. These computations assumed the parameters for the stellar wind and the CME to be typical of the solar values. [...]
arXiv:1609.08933.- 2016 - 14 p. - Published in : Issue 2 (2016) 183-192 External link: Preprint

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2016-09-29
07:53
Magmatic sulfides in the porphyritic chondrules of EH enstatite chondrites / Piani, Laurette ; Marrocchi, Yves ; Libourel, Guy ; Tissandier, Laurent
The nature and distribution of sulfides within 17 porphyritic chondrules of the Sahara 97096 EH3 enstatite chondrite have been studied by backscattered electron microscopy and electron microprobe in order to investigate the role of gas-melt interactions in the chondrule sulfide formation. Troilite (FeS) is systematically present and is the most abundant sulfide within the EH3 chondrite chondrules. [...]
arXiv:1609.08750.- 2016 - 34 p. - Published in : Geochimica et Cosmochimica Acta, 2016 External link: Preprint

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2016-09-29
07:53
Planet detection down to a few $\lambda$/D: an RSDI/TLOCI approach to PSF subtraction / Gerard, Benjamin L ; Marois, Christian /GPIES team
Most current high contrast imaging point spread function (PSF) subtraction algorithms use some form of a least-squares noise minimization to find exoplanets that are, before post-processing, often hidden below the instrumental speckle noise. In the current standard PSF subtraction algorithms, a set of reference images is derived from the target image sequence to subtract each target image, using Angular and/or Simultaneous Spectral Differential Imaging (ADI, SSDI, respectively). [...]
arXiv:1609.08692.- 2016 - 13 p. - Published in : Proc. SPIE 9909, Adaptive Optics Systems V, 990958 (27 July 2016) External link: Preprint

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2016-09-29
07:53
Gemini Planet Imager Observational Calibrations XIV: Polarimetric Contrasts and New Data Reduction Techniques / Millar-Blanchaer, Maxwell A ; Perrin, Marshall D ; Hung, Li-Wei ; Fitzgerald, Michael P ; Wang, Jason J ; Chilcote, Jeffrey ; Graham, James R ; Bruzzone, Sebastian ; Kalas, Paul G /GPI collaboration
The Gemini Planet Imager (GPI) has been designed for the direct detection and characterization of exoplanets and circumstellar disks. GPI is equipped with a dual channel polarimetry mode designed to take advantage of the inherently polarized light scattered off circumstellar material to further suppress the residual seeing halo left uncorrected by the adaptive optics. [...]
arXiv:1609.08691.- 2016 - 17 p. - Published in : Proc. SPIE 9908, Ground-based and Airborne Instrumentation for Astronomy VI, 990836 (August 9, 2016) External link: Preprint

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