Results 261 to 270 of about 60,457 (299)
Some of the next articles are maybe not open access.
Excitation of electrostatic fluctuations by thermal modulation of whistlers
Journal of Geophysical Research: Space Physics, 1986It is shown that a large‐amplitude field‐aligned whistler wave can excite nonducted whistler sidebands and nonresonant low‐frequency electrostatic collisional gradient drift modes. The effects of the ponderomotive force as well as the heating nonlinearities are included in the study of the modulational instabilities.
L. Stenflo, P. K. Shukla, M. Y. Yu
openaire +1 more source
Nonlinear Vibration of an Electrostatically Excited Capacitive Microplate
2020This study aims at understanding the transient vibration of an electrostatically excited microplate considering the effects of different boundary conditions. The partial differential equations of motion of rectangular microplate-based microelectromechanical systems (MEMS) are derived within the framework of the classical plate theory and von Karman ...
Hamed Kalhori +4 more
openaire +1 more source
Electrostatic Shocks Excited by Velocity Modulation of an Ion Beam in a Plasma
Physical Review Letters, 2004Nonlinear evolutions of electrostatic shocks excited by a velocity-modulated ion beam along a magnetized plasma column are investigated by computer simulation for a Q-machine experiment. In the case of a beam velocity modulation, the perturbations grow spatially with subsequent saturation due to an ion bunching of the beam.
Takuma, Gohda +3 more
openaire +2 more sources
Stabilization of electrostatically actuated microstructures using parametric excitation
Journal of Micromechanics and Microengineering, 2005Electrostatically actuated microstructures are inherently nonlinear and can become unstable. Pull-in instability is encountered as a basic instability mechanism. We demonstrate that the parametric excitation of a microstructure by periodic (ac) voltages may have a stabilizing effect and permits an increase of the steady (dc) component of the actuation ...
Slava Krylov, Isaac Harari, Yaron Cohen
openaire +1 more source
Electrostatic excitation and capacitive detection of flexural plate-waves
Sensors and Actuators A: Physical, 1993Abstract A novel type of interdigital transducer has been developed for the excitation and detection of flexural plate-waves on very thin membranes. The launching transducer employs electrostatic forces for generating A0-mode flexural plate-waves. The receiving transducer detects the plate-waves via capacitive changes. The transducers operate without
T. Giesler, J.-U. Meyer
openaire +1 more source
Absolute excitation energy measurements using an electrostatic analyzer
Nuclear Instruments and Methods, 1977Abstract The excitation energies of several states in 6Li, 11B, 12C, 27Al and 56Fe have been measured in terms of the standard meter and the standard volt. The energy of the electron beam from a FN Tandem Accelerator was measured absolutely with a 61 cm radius electrostatic analyzer to an uncertainty of 0.037%.
B. Wessels +4 more
openaire +1 more source
A dynamic flexural rigidity apparatus with electrostatic excitation
Journal of Scientific Instruments, 1964An apparatus is described for measuring the dynamic flexural rigidity, and elastic and loss moduli, of thin materials through the method of resonance vibration, excited by electrostatic forces. An earthed specimen is placed between two electrodes, to which a balance alternating potential up to 4 kv with a positive bias of 500 v is applied from an ...
openaire +1 more source
Electrostatic excitations in non-Maxwellian space plasmas
2015 IEEE International Conference on Plasma Sciences (ICOPS), 2015Highlighting some basic properties of plasmas and relevant applications, we present preliminary stuff on linear and nonlinear waves. Space and astrophysical plasmas may be composed of superthermal (accelerated) particles, which can be appropriately described by the non-Maxwellian (Kappa) distribution function rather than traditional Maxwellian ...
openaire +1 more source
Ionic electrostatic excitations along biological membranes
Physics of Plasmas, 2011A theoretical analysis of ionic electrostatic excitations of a charged biological membrane is presented within the framework of the fluid theory for surface ions inside and outside the cell, in conjunction with the Poisson’s equation. General expressions of dispersion relations are obtained for electrostatic oscillations of intrinsic cellular with ...
openaire +1 more source
Resonant excitation of electrostatic modes with electromagnetic waves
The Physics of Fluids, 1973Two electromagnetic waves, propagating in opposite directions, can resonantly excite electron or ion waves, if the difference frequency Δω and wave number Δk satisfy the linear dispersion relation of such modes. This process damps the higher-frequency electromagnetic wave and amplifies the lower-frequency one (nonlinear Landau damping).
openaire +1 more source