The effect of a temporal modulation at three times the critical frequency on a Hopf bifurcation is studied in the framework of amplitude equations. We consider a complex Ginzburg-Landau equation with an extra quadratic term, resulting from the strong coupling between the external field and the unstable modes. We show that, by increasing the intensity of the forcing, one passes from an oscillato...

We experimentally investigate the first-order correlation function of a trapped Fermi gas in the two-dimensional BEC-BCS crossover. We observe a transition to a low-temperature superfluid phase with algebraically decaying correlations. We show that the spatial coherence of the entire trapped system can be characterized by a single temperature-dependent exponent. We find the exponent at the tran...

S countries abolish the death penalty during their transition from war to peace or from an authoritarian to a democratic regime. In other cases, countries regard the death penalty as a necessary policy to promote their transition. In whatever way, it seems that the transition process has some impact on death penalty policy. How and to what extent is this so, and what exactly are the elements th...

This paper studies an infinite-server queue in a semi-Markov environment: the queue’s input rate is modulated by a semi-Markovian background process, and the service times are assumed to be exponentially distributed. The primary objective of this paper is to propose approximations for the queue-length distribution, based on time-scaling arguments. The analysis starts with an explicit analysis o...

We report on a BeppoSAX observation of the transient X–ray pulsar 4U 0115+63 close to periastron. This led to the discovery of a dramatic luminosity variation from ∼ 2×1034 erg s−1 to ∼ 5×1036 erg s−1 (factor > ∼ 250) in less than 15 hr. The variation was accompanied by only minor (if any) changes in the emitted spectrum and pulse fraction. On the contrary an observation near apastron detected ...

The effects of different parameters on the hydrodynamics of trickle bed reactors were discussed for Newtonian and non-Newtonian foaming systems. The varying parameters are varying liquid velocities, gas flow velocities and surface tension. The range for gas velocity is particularly large, thanks to the use of dense gas to simulate very high pressure conditions. This data bank has been used to c...

This research studies the low carbon transition of the electric power sector in China using a multi-level perspective (MLP) of niches, socio-technical regime, and landscape, as well as literature on innovation systems. Three lines of thought on transition process are integrated in the paper to probe the possible transition pathways in China. A MLP analysis is presented to understand the current...

I discuss new results concerning the evolution of the bispectrum due to gravitational instability from gaussian initial conditions using one-loop perturbation theory (PT). Particular attention is paid to the transition from weakly non-linear scales to the non-linear regime at small scales. Comparison with numerical simulations is made to assess the regime of validity of the perturbative approach.

We report a unifying approach to the Goos-Hänchen (GH) shifts on external optical reflection for metals and dielectrics in particular for the case of high losses, that is for a large imaginary part of the dielectric constant. In this regime metals and dielectrics have a similar GH shift which is in contrast to the low-loss regime where the metallic and dielectric forms of the GH shift are very ...

I consider the effect of the finite width of the resonant level on its thermodynamics and tunneling transport properties in the single electron charging regime. The finite width of the levels results from their delocalization with formation of a narrow band due to their mutual overlap. Making use of 1/N technique one can show that there is a fixed energy level position at which the system under...