Results
repositories = "HAL - Hyper Article on Line"
> : "Physical Review Letterss"
(x)
High-Rayleigh-Number Convection in a Vertical Channel
Description :
We measure the relation between convective heat flux and temperature gradient in a vertical channel filled with water, the average vertical mass flux being zero. Compared to the classical Rayleigh-Bénard case, this situation has the advantage of avoiding plates and, thus, their neighborhood, in whic...
Repository :
HAL - Hyper Article on Line
Language(s) :
English
Entropy production and time asymmetry in nonequilibrium fluctuations
Author(s) :
Andrieux, David
,
Gaspard, Pierre
,
Ciliberto, Sergio
,
Garnier, Nicolas
,
Joubaud, Sylvain
,
Petrosyan, Artyom
Description :
The time-reversal symmetry of nonequilibrium fluctuations is experimentally investigated in two out-of-equilibrium systems namely, a Brownian particle in a trap moving at constant speed and an electric circuit with an imposed mean current. The dynamical randomness of their nonequilibrium fluctuation...
Repository :
HAL - Hyper Article on Line
Language(s) :
English
Discrepancy between sub-critical and fast rupture roughness : a cumulant analysis
Author(s) :
Mallick, Nicolas
,
Cortet, Pierre-Philippe
,
Santucci, Stéphane
,
Roux, Stéphane
,
Vanel, Loïc
Description :
Rough crack fronts in a sheet of paper, obtained during a creep experiment, do not follow true scaling laws. Local roughness exponents are estimated using the first order cumulant, a quantity recently introduced in the turbulence literature. Using a large data set (102 fronts), we find a significant...
Repository :
HAL - Hyper Article on Line
Language(s) :
English
Sub-critical statistics in rupture of fibrous materials : experiments and model.
Description :
We study experimentally the slow growth of a single crack in a fibrous material and observe stepwise growth dynamics. We model the material as a lattice where the crack is pinned by elastic traps and grows due to thermally activated stress fluctuations. In agreement with experimental data we find th...
Repository :
HAL - Hyper Article on Line
Language(s) :
English
Thermodynamics of DNA loops with long-range correlated structural disorder.
Description :
We study the influence of a structural disorder on the thermodynamical properties of 2D-elastic chains submitted to mechanical/topological constraint as loops. The disorder is introduced via a spontaneous curvature whose distribution along the chain presents either no correlation or long-range corre...
Repository :
HAL - Hyper Article on Line
Language(s) :
English
From DNA sequence analysis to modeling replication in the human genome.
Author(s) :
Brodie Of Brodie, Edward-Benedict
,
Nicolay, Samuel
,
Touchon, Marie
,
Audit, Benjamin
,
D'Aubenton-Carafa, Yves
Description :
We explore the large-scale behavior of nucleotide compositional strand asymmetries along human chromosomes. As we observe for 7 of 9 origins of replication experimentally identified so far, the (TA+GC) skew displays rather sharp upward jumps, with a linear decreasing profile in between two successiv...
Repository :
HAL - Hyper Article on Line
Language(s) :
English
A Three Dimensional Kasteleyn Transition: Spin Ice in a [100] Field
Description :
We examine the statistical mechanics of spin-ice materials with a [100] magnetic field. We show that the approach to saturated magnetisation is, in the low-temperature limit, an example of a 3D Kasteleyn transition, which is topological in the sense that magnetisation is changed only by excitations ...
Repository :
HAL - Hyper Article on Line
Language(s) :
English
Measuring overlaps in mesoscopic spin glasses via conductance fluctuations
Description :
We consider the electonic transport in a mesoscopic metallic spin glasses. We show that the distribution of overlaps between spin configurations can be inferred from the reduction of the conductance fluctuations by the magnetic impurities. Using this property, we propose new experimental protocols t...
Repository :
HAL - Hyper Article on Line
Language(s) :
English
Intermittency of Velocity Time Increments in Turbulence
Author(s) :
Chevillard, Laurent
,
Roux, Stéphane
,
Lévêque, Emmanuel
,
Mordant, Nicolas
,
Pinton, Jean-François
,
Arnéodo, Alain
Description :
We analyze the statistics of turbulent velocity fluctuations in the time domain. Three cases are computed numerically and compared: (i) the time traces of Lagrangian fluid particles in a (3D) turbulent flow (referred to as the dynamic case); (ii) the time evolution of tracers advected by a frozen tu...
Repository :
HAL - Hyper Article on Line
Language(s) :
English
Numerical Study of Dynamo Action at Low Magnetic Prandtl Numbers
Author(s) :
Ponty, Yannick
,
Mininni, Pablo
,
Montgomery, David
,
Pinton, Jean-François
,
Politano, Hélène
,
Pouquet, Annick
Description :
We present a three-pronged numerical approach to the dynamo problem at low magnetic Prandtl numbers PM . The difficulty of resolving a large range of scales is circumvented by combining direct numerical simulations, a Lagrangian-averaged model and large-eddy simulations. The flow is generated by the...
Repository :
HAL - Hyper Article on Line
Language(s) :
English