We consider the influence of microlensing on different spectral bands of lensed QSOs. We assumed that the emitting X-ray, UV and optical regions are different in size, but that the continuum emission in these spectral bands is originating from an accretion disc. Estimations of the time scales for microlensing and flux amplification in different bands are given. We found that the microlensing du...

We report on diffuse X-ray emission associated with the nearby solitary millisecond pulsar PSR J2124−3358 detected with XMM-Newton and Chandra. The emission extends from the pulsar to the northwest by ∼ 0.5 arcmin. The spectrum of the nebular emission can be modeled with a power-law of photon index 2.2 ± 0.4, in line with the emission originating from accelerated particles in the post shock flo...

"Simple limiter control" of chaotic systems is analytically and numerically investigated, proceeding from the one-dimensional case to higher dimensions. The properties of the control method are fully described by the one-parameter one-dimensional flat-top map family, implying that orbits are stabilized in exponential time, independent of the periodicity and without the need for targeting. Fine-...

In this paper a new design of a broadband microwave power limiter is presented and validated into simulation by using ADS software (Advanced Design System) from Agilent technologies. The final circuit is built on microstrip lines by using identical Zero Bias Schottky diodes. The power limiter is designed by Associating 3 stages Schottky diodes. The obtained simulation results permit to validate...

The two-phase drift flux model is extensively used in multiphase flow applications. In this study, we focus on possible numerical schemes for solving the model. Due to complexity of primitive equations and empirical parameters, it challenging achieve stability scheme high resolution second order central scheme, central-upwind third fifth weighted essentially non-oscillatory (WENO) were successf...

Flux rope fitting (FRF) techniques are an invaluable tool for extracting information about the properties of a subclass of coronal mass ejections (CMEs) in the solar wind. However, it has proven difficult to assess their accuracy since the underlying global structure of the CME cannot be independently determined from the data. In contrast, large-scale MHD simulations of CME evolution can provid...

Theoretical investigation of the use of feedback around the limiter for improving the capture conditions at the input to the limiter has led to the formulation of a simple theory that unfolds some remarkable properties hitherto unreported. Contrary to the claim of R. M. Wilmotte (1), who made the first (and apparently only) around-the-limiter feedback proposal that exists in published work, thi...

We report experimental control of chaos in an electronic circuit at 43.9 MHz, which is the fastest chaos control reported in the literature to date. Limiter control is used to stabilize a periodic orbit in a tuned collector transistor oscillator modified to exhibit simply folded band chaos. The limiter is implemented using a transistor to enable monitoring the relative magnitude of the control ...

In this paper, we establish a rigorous connection between microscopic and macroscopic pedestrians model on convergent junction. At the level, consider “follow leader” far from junction point assume that rule to enter is imposed. obtain Hamilton-Jacobi equation with flux limiter condition at x = 0 introduced in Imbert Monneau [ Ann. Sci. l’École Normale Supér . 50 (2017) 357-414], To our result,...