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  • Articles  (32)
  • Other Sources  (3)
  • 1980-1984  (24)
  • 1975-1979  (11)
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  • Articles  (32)
  • Other Sources  (3)
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  • 1
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    Computation of seismic wave fields in inhomogeneous media - Gaussian beam approach (1982)
    In:  Geophys. J. R. astr. Soc., Warszawa, Conseil de l'Europe, vol. 70, no. March, pp. 109-128, pp. 1095, (ISBN: 0-12-018847-3)
    Details
    Publication Date: 1982
    Keywords: Seismology ; Inhomogeneity ; Seismics (controlled source seismology) ; Ray seismics ; Ray tracing ; Cerveny ; Psencik ; Synthetic seismograms ; GJRaS
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    BIBLIOGRAPHY SEISMOLOGY
  • 2
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    Synthetic body wave seismograms for laterally layered structures by the Gaussian beam method (1983)
    In:  Geophys. J. R. astr. Soc., Warszawa, Conseil de l'Europe, vol. 73, no. March, pp. 389-426, pp. 1095, (ISBN: 0-12-018847-3)
    Details
    Publication Date: 1983
    Keywords: Seismology ; Inhomogeneity ; Seismics (controlled source seismology) ; Ray seismics ; Ray tracing ; Body waves ; Cerveny ; GJRaS ; Synthetic seismograms
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    BIBLIOGRAPHY SEISMOLOGY
  • 3
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    Ray Methods in Seismology (1977)
    Charles Univ. Press
    In:  Prague, 214 pp., Charles Univ. Press, vol. 42, no. 3, pp. 275-291, (0-596-00648-9, 3rd edition 2005. XXII, 509 pp.)
    Details
    Publication Date: 1977
    Keywords: Seismology ; Textbook of geophysics ; Seismics (controlled source seismology) ; Ray seismics ; Ray tracing ; Cerveny ; Psencik ; Synthetic seismograms
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    BIBLIOGRAPHY SEISMOLOGY
  • 4
    Electronic Resource
    Electronic Resource
    Computation of ray amplitudes in inhomogeneous media with curved interfaces (1978)
    Springer
    Studia geophysica et geodaetica 22 (1978), S. 248-258 
    Details
    ISSN: 1573-1626
    Source: Springer Online Journal Archives 1860-2000
    Topics: Architecture, Civil Engineering, Surveying , Geosciences , Physics
    Notes: Summary This paper is a continuation of[1]. It is mainly devoted to problems connected with the application of the method of determination of geometrical spreading in laterally inhomogeneous media with curved interfaces based on the solution of eight (in a three-dimensional medium) or two (in a two-dimensional medium) linear ordinary differential equations of the first order. The method of determination of the partial derivatives of velocity with respect to the special coordinates, connected with the ray under investigation, and the methods of determination of the initial values for the system of differential equations at the source and at the interfaces are proposed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01627902
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    Reduction of the number of knots in the approximation by smoothed cubic splines (1981)
    Springer
    Studia geophysica et geodaetica 25 (1981), S. 61-68 
    Details
    ISSN: 1573-1626
    Source: Springer Online Journal Archives 1860-2000
    Topics: Architecture, Civil Engineering, Surveying , Geosciences , Physics
    Notes: Summary A method of approximation, minimizing the number of knots and satisfying the smoothing and fitting properties of the cubic spline approximation, is suggested. Two modifications of the method are presented. The first approach is specified to provide an adequate simple approximation to the digitalized smooth curve (such as the velocity-depth function in seismology), while the second is more general and may be used to approximate geophysical measurements, which may include errors.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01613561
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  • 6
    Electronic Resource
    Electronic Resource
    Anomalous behaviour of seismic waves at an interface between anisotropic media (1981)
    Springer
    Studia geophysica et geodaetica 25 (1981), S. 152-159 
    Details
    ISSN: 1573-1626
    Source: Springer Online Journal Archives 1860-2000
    Topics: Architecture, Civil Engineering, Surveying , Geosciences , Physics
    Notes: Summary An account of possible anomalous effects in reflection and refraction of elastic waves at an interface between anisotropic media is presented. These effects are due to anisotropy and they cannot occur at an interface between isotropic media. The shape of the slowness surface (its local deviations from spherical symmetry) is the decisive factor for appearance of these effects. A numerical example of such anomalous behaviour of elastic waves at a free boundary of the crystal of spinel is presented.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01635370
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  • 7
    Electronic Resource
    Electronic Resource
    The effect of local geological conditions onP-wave amplitudes (1979)
    Springer
    Studia geophysica et geodaetica 23 (1979), S. 381-387 
    Details
    ISSN: 1573-1626
    Source: Springer Online Journal Archives 1860-2000
    Topics: Architecture, Civil Engineering, Surveying , Geosciences , Physics
    Notes: Summary At two observation sites located in different geological conditions seismic waves from borehole shots and from quarry blast were recorded with a three-component broadband instrument. The analysis of dynamic characteristics, based on the experimental investigation of the displacement amplitudes, is presented.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01633243
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  • 8
    Electronic Resource
    Electronic Resource
    Tensional crack development in physical models with inhomogeneities under load (1980)
    Springer
    Studia geophysica et geodaetica 24 (1980), S. 373-381 
    Details
    ISSN: 1573-1626
    Source: Springer Online Journal Archives 1860-2000
    Topics: Architecture, Civil Engineering, Surveying , Geosciences , Physics
    Notes: Summary The paper deals with a study of the mean stress field (σM) and its gradient (δσM/δx) in uniaxially loaded two-dimensional models of small thickness with respect to other dimensions, in which two inhomogeneities, e.g., a circular opening and a linear slit have been made. Particular attention was paid to the stress field development in the treated models durin gthe change of the mutual geometric configuration of both the inhomogeneities in question. The problem was analysed theoretically by means of Muskhelishvili's potentials of the two-dimensional theory of elasticity. To compare the results of calculations, the schlieren method was used to visualize and record the studied gradients of stress fields in physical models. The results of the calculations were calibrated by laboratory tests. In this way the individual model situations were classified from the point of view of their resistance to the applied load.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01629396
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  • 9
    Electronic Resource
    Electronic Resource
    Reliability of focal mechanism determination (1981)
    Springer
    Studia geophysica et geodaetica 25 (1981), S. 224-230 
    Details
    ISSN: 1573-1626
    Source: Springer Online Journal Archives 1860-2000
    Topics: Architecture, Civil Engineering, Surveying , Geosciences , Physics
    Notes: Summary The fault plane solution determined by means of a computer algorithm, correlating the radiation pattern with the distribution of observations, was investigated from the point of view of its reliability. The maximum of the correlation function R corresponds to the optimum solution found by the computer. If the families of nodal lines fitting the decreased correlation function R —dR retain the character of the optimum solution even whendR increases, we assume that the solution has been determined with a sufficient accuracy.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01591934
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  • 10
    Electronic Resource
    Electronic Resource
    Laboratory investigations on fault plane induced tensile cracks (1981)
    Springer
    Studia geophysica et geodaetica 25 (1981), S. 332-342 
    Details
    ISSN: 1573-1626
    Source: Springer Online Journal Archives 1860-2000
    Topics: Architecture, Civil Engineering, Surveying , Geosciences , Physics
    Notes: Summary Tensile cracks induced by stress concentration around a fault plane in physical models under uniaxial load were analyzed. The results characterizing the decisive role of the fault plane inclination to the the stress direction are presented. Two stages of tensile crack life were determined, i.e. the first, seismoactive stage, accompanied by seismic energy release and the second aseismic one characterized by low velocity of crack propagation. Results obtained seem to be relevant to a better understanding of the character and regime of actual seismoactive faults.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01629218
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