Results 21 to 30 of about 9,807 (209)

A significant decrease of the fundamental Schumann resonance frequency during the solar cycle minimum of 2008-9 as observed at Modra Observatory

open access: yesContributions to Geophysics and Geodesy, 2009
The  Schumann resonances (SR)  are  electromagnetic eigenmodes  of the resonator  bounded by  the Earth’s surface  and  the lower  ionosphere.   The  SR  frequency variability has  been  studied for more  than 4 decades.
Adriena ONDRÁŠKOVÁ   +2 more
doaj   +1 more source

A D-region conductivity model from EISCAT VHF measurements [PDF]

open access: yesAnnales Geophysicae, 2002
An easy-to-use model to evaluate conductivities at high and middle latitudes in the height range 70–100 km is presented. It is based on electron density profiles obtained with the EISCAT VHF radar during 11 years and on the neutral atmospheric ...
K. Schlegel, K. Schlegel, M. Füllekrug
doaj   +1 more source

Non-Lorentzian line shapes for interfering rotational resonances in the predissociation of O(2) [PDF]

open access: yes, 1997
Rotationally resolved measurements are presented of interacting predissociating resonances in the Schumann-Runge bands of O₂that exhibit destructive quantum interference for energies between the line centers.
Baldwin, Kenneth G. H.   +5 more
core   +1 more source

Influence d’un modèle littéraire dans la musique de chambre de Schumann : le Märchen

open access: yesTr@jectoires, 2007
Robert Schumann (1810-1856), fils d’un libraire et éditeur, féru de littérature depuis son plus jeune âge, passionné de poésie, amoureux de Jean Paul et Hoffmann, a longtemps hésité entre deux vocations : poète et musicien. De nombreux travaux ont montré
Sylvine Delannoy
doaj   +1 more source

DNA waves and water [PDF]

open access: yes, 2010
Some bacterial and viral DNA sequences have been found to induce low frequency electromagnetic waves in high aqueous dilutions. This phenomenon appears to be triggered by the ambient electromagnetic background of very low frequency.
A Tedeschi   +12 more
core   +1 more source

Influence of heating experiments on parameters of Schumann resonances

open access: yesE3S Web of Conferences, 2017
Recently the significant increase in intensity of researches in the field of the fissile impact on geophysical processes in various environments is noted.
Agranat Irina, Sivokon Vladimir
doaj   +1 more source

Measurements of atmospheric electricity in the Széchenyi István Geophysical Observatory, Hungary [PDF]

open access: yesHistory of Geo- and Space Sciences, 2020
The Széchenyi István Geophysical Observatory, also known as the Nagycenk Geophysical Observatory (NCK), was established in 1957. It has been the only measurement site in Hungary where observations of various parameters of the atmospheric global electric ...
J. Bór   +11 more
doaj   +1 more source

The iterative complex demodulation applied on short and long Schumann resonance measured sequences

open access: yesContributions to Geophysics and Geodesy, 2014
The precise determination of instantaneous frequency of Schumann resonance (SR) modes, with the possibility of application to relatively short signal sequences, seems to be important for detailed analysis of SR modal frequency variations.
Adriena ONDRÁŠKOVÁ   +1 more
doaj   +1 more source

Propagation of ELF Radiation from RS-LC System and Red Sprites in Earth-Ionosphere Waveguide

open access: yesAdvanced Electromagnetics, 2012
In this paper, two different mechanisms return stroke-lateral corona (RS-LC) system and red sprites which excite Earth-ionosphere waveguide have been discussed.
M. K. Paras, J. Rai
doaj   +1 more source

Variations in Schumann resonances and their relation to atmospheric electric parameters at Nagycenk station [PDF]

open access: yesAnnales Geophysicae, 1997
The present study is based on simultaneous measurements of the atmospheric electric potential gradient (PG) and Schumann resonances at Nagycenk station (Hungary) from 1993 to 1996.
F. Märcz, G. Sátori, B. Zieger
doaj   +1 more source

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