Results 31 to 40 of about 137,740 (294)

Modeling the Intermittent Lava Lake Drops Occurring Between 2015 and 2021 at Nyiragongo Volcano

open access: yesGeophysical Research Letters, 2023
Between 2015 and 2021, Nyiragongo's lava lake level experienced a linear increase punctuated by fast intermittent drops. These drops occurred synchronously to seismic swarm at approximately 15 km below the surface and extending laterally NE from the ...
D. Walwer   +5 more
doaj   +1 more source

Oscillation modes of dc microdischarges with parallel-plate geometry

open access: yes, 2011
Two different oscillation modes in microdischarge with parallel-plate geometry has been observed: relaxation oscillations with frequency range between 1.23 and 2.1 kHz and free-running oscillations with 7 kHz frequency.
Dragana Marić   +7 more
core   +1 more source

Mesoscopic Capacitance Oscillations

open access: yes, 2006
We examine oscillations as a function of Fermi energy in the capacitance of a mesoscopic cavity connected via a single quantum channel to a metallic contact and capacitively coupled to a back gate.
Büttiker M   +4 more
core   +4 more sources

Electron-Beam Driven Relaxation Oscillations in Ferroelectric Nanodisks [PDF]

open access: yes, 2015
Using a combination of computational simulations, atomic-scale resolution imaging and phenomenological modelling, we examine the underlying mechanism for nanodomain restructuring in lead zirconate titanate (PZT) nanodisks driven by electron beams.
Ashok Kumar   +9 more
core   +2 more sources

Self-generated and externally driven current oscillations in n-GaAs [PDF]

open access: yes, 1994
Experimental investigations of self-generated and externally driven non-linear current oscillations due to impact ionization of shallow impurities in n-type GaAs at low temperatures are presented.
Prettl, Wilhelm, Spangler, J.
core   +1 more source

Stochastic and chaotic relaxation oscillations [PDF]

open access: yesJournal of Statistical Physics, 1989
For relaxation oscillators stochastic and chaotic dynamics are investigated. The effect of random perturbations upon the period is computed. For an extended system with additional state variables chaotic behavior can be expected. As an example, the Van der Pol oscillator is changed into a third-order system admitting period doubling and chaos in a ...
Grasman, J., Roerdink, J.B.T.M.
openaire   +2 more sources

Pentatonic sequences and monaural beats to facilitate relaxation: an EEG study

open access: yesFrontiers in Psychology
IntroductionIn two studies we investigated if specific acoustic stimulations could be more effective to induce a relaxation response in comparison to silence. Acoustic stimulations included monaural beats and musical sequences based on a pentatonic scale.
Marco Costa   +5 more
doaj   +1 more source

Complex non-exponential form of damped vibrations in uniaxially oriented polymeric materials with one mechanical degree of freedom

open access: yesPhysics of Complex Systems, 2023
In the present paper the relaxation properties of uniaxially oriented polymer threads are investigated. Vibrational relaxation in mechanical system with one degree of freedom is analyzed.
Дмитрий Сергеевич Вавилов   +2 more
doaj   +1 more source

Equilibration and Approximate Conservation Laws: Dipole Oscillations and Perfect Drag of Ultracold Atoms in a Harmonic Trap

open access: yes, 2015
The presence of (approximate) conservation laws can prohibit the fast relaxation of interacting many-particle quantum systems. We investigate this physics by studying the center-of-mass oscillations of two species of fermionic ultracold atoms in a ...
Bamler, Robert, Rosch, Achim
core   +1 more source

Heterostructure of TiO2 and macroporous silicon: The simplest relaxation oscillator

open access: yesJournal of Science: Advanced Materials and Devices, 2021
A heterostructure composed of TiO2 and macroporous silicon in this study may represent the simplest relaxation oscillator ever reported. It consisted of macroporous Si with TiO2 grown on its pore walls, and metallic contacts.
Abel Garzon-Roman   +2 more
doaj   +1 more source

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