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Observations of the HF-enhanced plasma line with a 46.8MHz radar and reinterpretation of previous observations with the 430 MHZ radar
(American Geophysical Union, 1982)
During 5.1 MHz HF transmissions below the F-region penetration frequency by a nearby ionospheric modification facility, radar echoes coming from F-region heights at a frequency of 46.8 + 5.1 = 51.9 MHz were received while ...
A nonlinear model for multilayered rubber isolators based on a co-rotational formulation
(2017-01)
This article proposes a geometrically nonlinear co-rotational model aimed to characterize the mechanical behavior of elastomeric seismic isolators. The model is able to capture the axial and lateral coupling in both axial ...
Magnetized hybrid stars: Effects of slow and rapid phase transitions at the quark-hadron interface
(Wiley Blackwell Publishing, Inc, 2019-11)
We study the influence of strong magnetic fields in hybrid stars, composed by hadrons and a pure quark matter core, and analyse their structure and stability as well as some possible evolution channels due to the magnetic ...
Non-linear dynamic response of a rotating thin-walled composite beam
(Asociación Argentina de Mecánica Computacional, 2010-11)
The nonlinear planar response of a cantilever rota ting slender beam to a principal parametric resonance of its first bending mode is analyzed. The equation of motion is obtained in the form of an integro-partial differential ...
Estudio paramétrico para optimización de un generador de hielo tubular de laboratorio
(2020-01)
En Ecuador existe un gran consumo energético por
climatización y refrigeración en los sectores industrial,
comercial y residencial. Un método para reducir la
demanda eléctrica máxima es incorporar un sistema
óptimo de ...
Controle de sistemas dinâmicos não lineares com compensação por Processo Gaussiano
(BrasilUFRNPROGRAMA DE PÓS-GRADUAÇÃO EM ENGENHARIA MECÂNICA, 2019-08-30)
There are many techniques that may be employed in the design of control systems. PID
controllers, for example, are widely used in the industry, but have some disadvantages,
including instability issues when the system ...
Large-amplitude electromagnetic waves in magnetized relativistic plasmas with temperature
(European Geosciences Union&the American Geophysical Union, 2014)
Abstract. Propagation of large-amplitude waves in plasmas
is subject to several sources of nonlinearity due to relativistic
effects, either when particle quiver velocities in the wave
field are large, or when thermal ...
A NURBS-based finite element model applied to geometrically nonlinear elastodynamics using a corotational approach
(John Wiley & Sons Ltd, 2015-06)
A numerical model to deal with nonlinear elastodynamics involving large rotations within the framework of the finite element based on NURBS (Non-Uniform Rational B-Spline) basis is presented. A comprehensive kinematical ...
Temperature and relative humidity in a palaeontological collection: the buffering effect of microenvironments
(Association Paléontologique Française, 2020)
Adequate values of environmental parameters are crucial for the long term preservation of the fossils in a palaeontological collection. In particular, incorrect or fluctuating temperature (T) and relative humidity (RH) can ...
Seguridad en el colapso por inestabilidad bajo cargas laterales
(Universidad Nacional de Ingeniería, 2013)