Matter-space-time properties of the Universe     

Vladimír Skalský 《Astrophysics and Space Science》1994,219(2):275-289

In the expansive nondecelerative homogeneous and isotropic relativistic Universe there take place: the permanent constant maximum possible creation of matter, the relativistic increase of mass of expanding objects, the relativistic dilatation of time of expanding objects, the relativistic contraction of radial length of expanding objects, and the relativistic dilatation of angular dimensions of expanding remote objects.Editor's Note: The delay in publishing this paper was due to an unfortunate oversight connected with the late Professor Kopal's death.  相似文献   

Time and shape changes of the supergranular network     

J. Sýkora 《Solar physics》1970,13(2):292-300

From 20 K₂₃₂-spectroheliograms, time and shape changes of the supergranular network were investigated by means of autocorrelation curves. It was found that supergranules are lengthened in the direction of the solar rotation and this flattening fades out with growing activity of the region. Dimensions of the supergranular network increase with the activity of the corresponding region. The average diameter of the supergranules in the inactive regions is larger in the maximum of the solar cycle than in its minimum. The contrast of the calcium emission with respect to the background is double in the solar maximum in comparison with that in the minimum.  相似文献   

Radiative effects and interstellar diffuse features     

J. Svatoš  M. Šolc  V. Vanýsek 《Astrophysics and Space Science》1976,45(1):163-173

Absorption features of irradiated quartz and other silicates of tetrahedron structure are studied in this paper. The possibility that these materials can be one of the main contributors responsible for many of the observed features in the visible region at low temperatures is discussed.  相似文献   

Point-source Parameters from Noisy Waveforms: Error Estimate by Monte-Carlo Simulation     

Z. Jechumtálová  J. Šílený 《Pure and Applied Geophysics》2001,158(9-10):1639-1654

—?We introduce an approach to estimate the error in the determination of the point-source mechanism and corresponding source-time function by inverting waveform data contaminated by a noise. No a priori assumptions about the statistical characteristics of the noise are needed. The estimate of the confidence region of the retrieved source is constructed as a set of solutions of the inverse problem for individual realizations of noisy data. They are generated from a sample of observed noise by Monte-Carlo simulation: white noise is convolved with the observed noise sample yielding a particular realization of the noise, which is random but retains the spectral characteristics of the observed sample. This approach allows us to consider even the situations where the noise varies from station to station. However, the basic assumption is that the noise is random, thus the method cannot handle systematic errors, e.g., due to mislocation or incorrect model of the medium.¶Synthetic tests with noisy data simulating the configuration of the seismic network in Friuli, NE Italy, show that determination of the source-time function is rather uncertain even with low-noise contamination but that orientation of the mechanism is recovered very well. As an example, local waveforms of a magnitude 3 event from the 1988 Moggio Udinese swarm, Northern Italy, are processed.  相似文献   

On the product of legender functions as encountered in geodynamics     

Georges Balmino  Reviewer M. Šidlichovský 《Studia Geophysica et Geodaetica》1978,22(2):107-118

Résumé On rencontre souvent des produits de fonctions de Legendre en géodésie mathématique, en mécanique céleste et quantique, et en géophysique. Nous donnons les expressions générales des coefficients de la décomposition d'un produit quelconque sur la base des fonctions de Legendre ellesmêmes. Quelques applications immédiates sont envisagées.  相似文献   

Transmitted waves in the vicinity of the interface beyond the critical point     

Lothar Dresen  Stefan Freystätter  Jan Kozák  Ivan Pšenčík  Reviewer V. Červený 《Studia Geophysica et Geodaetica》1977,21(2):137-142

Summary The space (time) delay of transmitted waves in the vicinity of the interface beyond the critical point is investigated on two-dimensional seismic models of a low velocity channel; results of laboratory experiments are compared with the conclusions of the theory. The effect of the time delay in field measurements is demonstrated by means of two typical geological formations.  相似文献   

Macroseismic effects of the north-Italian earthquake of May 6th, 1976, on the territory of Czechoslovakia     

Dana Procházková  Libuše Ruprechtová  Zdeňka Schenková  Arnošt Dudek  Reviewer J. Janský 《Studia Geophysica et Geodaetica》1977,21(3-4):293-295

Summary The method of treatment of the macroseismic data obtained on the territory of the CSSR after the main 1976 Friuli earthquake is described and the preliminary results are confronted with the geologic structure.  相似文献   

Eine Bemerkung zu den Gezeitenbeobachtungen     

Jan Pícha  Lumír Skalský 《Studia Geophysica et Geodaetica》1960,4(3):285-289

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Определение положения начальной точки по амплитудным кривым отраженных волн     

Vlastislav Červený 《Studia Geophysica et Geodaetica》1963,7(3):286-288

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Beitrag zum Studium des Nullpunktsganges der Horizontalpendel     

Jan Picha  Lumír Skalský 《Studia Geophysica et Geodaetica》1958,2(3):243-260

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