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Mostrando ítems 11-20 de 1523
First steps toward the implementation of a cognitive radar to study plasma instabilities along the magnetic equator
(American Geophysical Union, 2015-03)
Cognitive radar is envisioned to be the future of remote-sensing systems. The idea proposed by details that a cognitive radar will have the ability to learn about the sensing environment and, over time, optimize returns ...
Instability, political regimes and economic growth: A theoretical framework
(John Wiley & Sons Inc., 2021-11-25)
This paper models the influence of political instability on long-term economic growth. We consider three political systems associated to real-world political systems of increasing participation in policy-making. For each ...
The Scan-LM to Test Instability in the Constant Coefficient of Spatial Autoregressive Models
(Pontificia Universidad Católica del Perú, 2021)
Stripes instability of an oscillating non-Brownian iso-dense suspension of spheres
(Europhysics Letters, 2018-03)
We analyze experimentally the behavior of a non-Brownian, iso-dense suspension of spheres submitted to periodic square wave oscillations of the flow in a Hele-Shaw cell of gap H. We do observe an instability of the initially ...
Instability onset for submerged cylinders
(American Institute of Physics, 2019-01)
This paper describes how the global stability of a circular cylinder is affected when submerged in a two-phase gravitational flow. The flow behavior is governed by both the Reynolds and the Froude number, while the depth ...
Vertical structure of the VHF backscattering region in the equatorial electrojet and the gradient drift instability
(American Geophysical Union, 1975-04-01)
Radar measurements made with high spatial resolution and large dynamic range at the Jicamarca Radar Observatory near the time of reversal of the electrojet current provide further proof that the gradient drift instability ...
Examine the local linear growth rate of collisional Rayleigh-Taylor instability during solar maximum
(American Geophysical Union, 2006-11-09)
This study is the first attempt to examine the effects of terms in the growth rate formula on the magnitude of growth rate during April 1999 to March 2000 (solar maximum). The estimation of linear growth rate is based on ...
Modulation instability in waveguides with an arbitrary frequency-dependent nonlinear coefficient
(Optical Society of America, 2020-05)
In this Letter, we present, for the first time, to the best of our knowledge, the modulation instability (MI) gain spectrum of waveguides with an arbitrary frequency-dependent nonlinear coefficient ensuring strict energy ...
Analytical study of coherence in seeded modulation instability
(American Physical Society, 2016-09)
We derive analytical expressions for the coherence in the onset of modulation instability, in excellent agreement with thorough numerical simulations. As usual, we start by a linear perturbation analysis, where broadband ...
Narrowband and ultra-wideband modulation instability in nonlinear metamaterial waveguides
(Optical Society of America, 2020-11)
Waveguides based on metamaterials may exhibit strongly frequency-dependent nonlinearities. In this work, we focus on the phenomenon of modulation instability in this type of waveguide, departing from a new modeling equation ...