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  • 1
    Electronic Resource
    Electronic Resource
    Seismic waves due to storm over the sea: I (1972)
    Springer
    Pure and applied geophysics 101 (1972), S. 43-53 
    Details
    ISSN: 1420-9136
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Summary Elastic wave propagation problem has been studied in the composite medium — a gravitating liquid layer overlying an elastic half-space. Assuming moving normal pressure load on the free surface, an attempt has been made to study the order of disturbance on the earth's surface. In the discussion asymptotic values of the displacement, components have been considered for small values of the parameter.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00876773
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  • 2
    Electronic Resource
    Electronic Resource
    Transmission of elastic waves through a second-order fluid layer sandwiched between elastic media (1970)
    Springer
    Pure and applied geophysics 78 (1970), S. 42-47 
    Details
    ISSN: 1420-9136
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Summary The present paper is concerned with the transmission of elastic waves through a second-order fluid layer sandwiched between homogeneous elastic media having identical properties. It is concluded that the transmission ratio increases with the increasing absolute values of visco-elastic co-efficient and also with the wavelength of the wave transmitted.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00874771
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  • 3
    Electronic Resource
    Electronic Resource
    A new dual frequency moving source-receiverem unit (1971)
    Springer
    Pure and applied geophysics 92 (1971), S. 185-189 
    Details
    ISSN: 1420-9136
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Summary The paper describes a new portable highly sensitive dual-frequency electromagnetic prospecting unit designed for detailedem surveys based on moving source compensation method. Employing horizontal-horizontal coil profiling, the unit is capable of working on a source-receiver separation of 330 feet (ninety meters) on both frequencies of 500 cycles per sec and 1500 cycles per sec to an accuracy of ±1%. The presence of secondary field characterised by two related components ‘in-phase’ and ‘out-of-phase’ are measured accurately to define the conductor characteristics. An unique provision is made for compensating the phase-shifts in the presence of medium to poor conductors, such as conductive overburden or relatively disseminated ore mineralisation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00875002
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  • 4
    Electronic Resource
    Electronic Resource
    Note on the torsional vibration of a thin beam of varying cross-section (1970)
    Springer
    Pure and applied geophysics 79 (1970), S. 18-21 
    Details
    ISSN: 1420-9136
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Summary In the present note the problem of torsional vibration of a bar in which the moment of inertia and the torsional rigidity are proportional to μ0 + μ1s, wheres is the spanwise co-ordinate and μ0 and μ1 are real numbers, has been considered.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00875473
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  • 5
    Electronic Resource
    Electronic Resource
    Earth-flattening procedure for the propagation of Rayleigh wave (1972)
    Springer
    Pure and applied geophysics 96 (1972), S. 61-74 
    Details
    ISSN: 1420-9136
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Summary The propagation of Rayleigh waves in the earth is investigated in the period range of about 60 to 590 seconds. It has been shown that a set of earth-flattening approximations can be used to transform the heterogeneous spherical earth into plane-layered earth on which the dispersion computations by matrix method can be applied effectively to describe the fundamental mode of spheroidal oscillations involving the crust and the mantly only.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00875629
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  • 6
    Electronic Resource
    Electronic Resource
    Elastic waves from a circular disc source (1972)
    Springer
    Pure and applied geophysics 95 (1972), S. 27-33 
    Details
    ISSN: 1420-9136
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Summary Elastic waves radiated by a finite circular disc source are compared for two models by treating it as the limit of an explosion inside a cavity in the form of a circular cylinder of small height or an oblate spheroid of small minor axis.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00878849
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  • 7
    Electronic Resource
    Electronic Resource
    Variations of the relative abundances of He, (C, N, O) and Fe-group nuclei in solar cosmic rays and their relationship to solar particle acceleration (1973)
    Springer
    Solar physics 31 (1973), S. 247-257 
    Details
    ISSN: 1573-093X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Measurements of the flux of helium nuclei in the 24 January, 1971, event and of helium and (C, N, O) nuclei in the 1 September, 1971, event are combined with previous measurements to obtain the relative abundances of helium, (C, N, O), and Fe-group nuclei in these events. These data are then summarized together with previously reported results to show that, even when the same detector system using a dE/dx plus range technique is used, differences in the He/(C, N, O) value in the same energy/nucleon interval are observed in solar cosmic ray events. Further, when the He/(C, N, O) value is lower the He/(Fe-group nuclei) value is also systematically lower in these large events. When solar particle acceleration theory is analyzed, it is seen that the results suggest that, for large events, Coulomb energy loss probably does not play a major role in determining solar particle composition at higher energies (〉 10 MeV). The variations in multicharged nuclei composition are more likely due to partial ionization during the acceleration phase.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00156087
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  • 8
    Electronic Resource
    Electronic Resource
    Solar cosmic ray composition above 10 MeV/nucleon and its energy dependence in the 4 August 1972 event (1974)
    Springer
    Solar physics 39 (1974), S. 479-491 
    Details
    ISSN: 1573-093X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Observations of the proton, helium, (C, N, O) and Fe-group nuclei fluxes made during the large 4 August 1972 solar particle event are presented. The results show a small, but significant variation of the composition of multiply-charged nuclei as a function of energy in the energy region above 10 MeV nucleon−1. In particular, the He/(C, N, O) abundance ratio varies by a factor ∼ 2 between 10 and 50 MeV nucleon−1 and the Fe-group/(C, N, O) ratio suggests a similar variation. Abundance ratios from the 4 August 1972 event are compared as a function of energy with ratios measured in other solar events to show that several of the earlier results are consistent with an energy variation like that observed in August 1972, while certain other events must have had a substantially different dependence of composition on energy. At energies ≳50 MeV nucleon−1, the He/(C, N, O) abundance ratio for August 1972 is consistent with all earlier measurements made above that energy which suggests that variations may vanish at high energies.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00162439
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  • 9
    Electronic Resource
    Electronic Resource
    Small molecules as chromotropes in metachromasia (1971)
    Springer
    Histochemistry and cell biology 27 (1971), S. 36-42 
    Details
    ISSN: 1432-119X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Interactions of cationic dye methylene blue with small polyanions like inositol hexasulfate, adenosine-triphosphate, ammonium molybdate, potassium ferro- and ferricyanide have been studied spectrophotometrically and conductometrically to ascertain the chromotropic characters of these polyanions. Results show that while almost all of them bind the dye stoichiometrically, none of them except ammonium molybdate is a chromotrope in the sense in which heparin, chondroitin sulfate etc. are. Inositol hexasulfate induces an intermediate spectra, though not perfectly metachromatic as is the case with inositol hexaphosphate. It is concluded that a chromotrope need not be a macromolecule to induce metachromasia in a dye solution, but the minimum number of charges per polyanion to give it a chromotropic character will vary with the nature of the polyanion.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00263366
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  • 10
    Electronic Resource
    Electronic Resource
    Post-irradiation dark recovery of photodamage to DNA induced by furocoumarins (1973)
    Springer
    Radiation and environmental biophysics 9 (1973), S. 113-119 
    Details
    ISSN: 1432-2099
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Physics
    Notes: Summary Photosensitization processes provoked by furocoumarins on various biological systems seem to be in connection with the photoreactions that these substances give bothin vitro andin vivo with pyrimidine bases of nucleic acids; in particular linear furocoumarins (psoralen) photoreact with native DNA giving both monofunctional and bifunctional additions (forming in this last case inter-strand cross-linkings) while angular furocoumarin (angelicin) can give only monofunctional additions. Previous studies on the possible recovery of this damage to DNA provoked both by linear and angular furocoumarins demonstrated that no repair underwent either by means of photosplitting experiments or through photoreactivation processes. In this paper are reported direct results indicating that the photodamage to DNA is repairable through post-irradiation dark recovery both operating on microbial cultures and on guinea-pig skin. In both biological systems monofunctional additions appear much more easily repairable than bifunctional additions; in any case bifunctional additions (which produce inter-strand cross-linkings) clearly appear to be repairable.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01215850
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