Il Nuovo Cimento C
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Solitary waves in the gulf of quarnaro revealed by LANDSAT thematic mapper
Tập 17 Số 2 - Trang 143-152 - 1994
The propagation of solitary wave trains in the Adriatic Sea is studied by means of LANDSAT Thematic-Mapper images. The baroclinic Rossby radius of deformation has been estimated from the width of a baroclinic current observed along the coast of Croatia using AVHRR data. The phase speed of the linear internal waves has been consequently estimated and the compatibility of the Kortweg-de Vries equati...... hiện toàn bộ
Diffuse galactic and extragalactic radiation in the far infra-red
Tập 8 Số 4 - Trang 353-367 - 1985
We present the results of a balloon flight devoted to the observation of the diffuse sky radiation in the wave-length region (150÷400) and (350÷3000) μm, at angular scales larger than six degrees. Observations of dust emission and distribution are discussed.
Long-distance drifting of ionization electrons in liquid and solid argon
Tập 9 Số 2 - Trang 621-635 - 1986
A study of ionization electron drifting long distances in liquid and solid argon was carried out with a 10 cm gridded ionization chamber, operated with electric fields between 10 V/cm and 2 kV/cm. A detailed analysis of the ionization pulse shape was performed with a FADC readout, yielding information on both the degree of purity of the liquid and the electron drift velocity. Argon with an impurit...... hiện toàn bộ
Solar neutrinos, the presolar abundance of helium and the solar metallicity
Tập 9 Số 3 - Trang 714-724 - 1986
The observational estimates of the presolar abundance of helium (Y s) are reviewed and a lower value ofY s ({-0.19 by mass fraction) is suggested to solve the solar-neutrino problem. With this reduced value ofY s it is argued from the point of view of maintaining the luminosity of the Sun at its observed level that the metallicity requirement isZ s{-0.013. Previous workers, while considering lower...... hiện toàn bộ
Experimental research on ball lightning
Tập 13 Số 4 - Trang 761-768 - 1990
Experiments on producing ball lightning were made with discharge in flammable gas and/or aerosol. A long lifetime (2 s) ball lightning was observed in 2.7% ethane and 100 cm3 cotton fibers, and in 1.5% methane and 1.9% ethane.
Evidence of internal gravity waves in the lower thermosphere at midlatitudes
Tập 4 Số 1 - Trang 1-25 - 1981
Wind measurements were made by the CNR Meteor Radar Station at Budrio (45°N, 12°E) in the April–September 1978 period in order to emphasize the role of internal gravity (IG) waves in the lower thermosphere ((80÷110) km). After briefly describing the basic properties of these waves, we determine some of their characteristics using both the conventional spectral-analysis methods and alternatively, f...... hiện toàn bộ
The Brera Tower air quality monitoring station
Tập 11 Số 5 - Trang 629-642 - 1988
The characteristics of the air quality monitoring station of Brera Tower are described. The station is focused on the study of air pollution in the urban area and on the aerosol chemistry and reactivity in the atmosphere. The influence of meteorological parameters is also taken into account. Results about the concentration, the chemical composition and the size distribution of suspended particulat...... hiện toàn bộ
Reversible electron heatingvs. Wave-particle interactions in quasi-perpendicular shocks
Tập 15 Số 5 - Trang 607-619 - 1992
The energy necessary to explain the electron heating in quasiperpendicular collisionless shocks can be derived either from the electron acceleration in the d.c. cross shock electric potential, or by the interactions between the electrons and the waves existing in the shock. A Monte Carlo simulation has been performed to study the electron distribution function evolution through the shock structure...... hiện toàn bộ
A propos des formules de Sutton
Tập 1 Số 5 - Trang 389-394 - 1978
The establishment of the fundamental Sutton's formula is criticized; this formula is recovered by a more correct mathematical reasoning, and generalized. Applications are only evoked. Si critica l'impostazione della formula fondamentale di Sutton; si ricupera questa formula con un ragionamento matematico più corretto e la si generalizza. Alle applicazioni si accenna solo. Критикуется вывод фундаме...... hiện toàn bộ
Theoretical and experimental power spectra of neutron monitor time series in 1978
Tập 3 Số 3 - Trang 267-272 - 1980
A comprehensive model for the spectral analysis of neutron monitor data is presented. The contributions to the power spectrum include scintillations in the interplanetary magnetic field caused by cosmic-ray diffusion along and perpendicularly to the field and Forbush-decrease effects. The effects of the Earth's rotation and of nonlinear interactions between particles and fields are taken into acco...... hiện toàn bộ