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  • 1
    Electronic Resource
    Electronic Resource
    The half-life and formation cross-section of ^1^7^7^mLu
    Amsterdam : Elsevier
    Journal of Inorganic and Nuclear Chemistry 29 (1967), S. 865-867 
    Details
    ISSN: 0022-1902
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1016/0022-1902(67)80069-1
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  • 2
    Electronic Resource
    Electronic Resource
    The geomagnetic response to the Earth's crossing of the heliospheric current sheet
    Amsterdam : Elsevier
    Advances in Space Research 13 (1993), S. 41-44 
    Details
    ISSN: 0273-1177
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0273-1177(93)90310-8
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  • 3
    Electronic Resource
    Electronic Resource
    The association of Coronal Mass Ejections during solar maximum times with the heliomagnetic current sheet
    Amsterdam : Elsevier
    Advances in Space Research 13 (1993), S. 183-186 
    Details
    ISSN: 0273-1177
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0273-1177(93)90475-Q
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  • 4
    Electronic Resource
    Electronic Resource
    Energy Spectra of Accelerated Solar Protons From Different Sources – I. Reconstruction and Properties of the Source Spectrum (1999)
    Springer
    Solar physics 186 (1999), S. 381-400 
    Details
    ISSN: 1573-093X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract It is widely accepted now that a significant fraction of the solar energetic particles (SEPs) observed at 1 AU after major solar flares are actually accelerated at a CME-driven shock. In addition, in the emerging new paradigm for SEP acceleration in different sources at or near the Sun, the existence of two types of flares – impulsive and gradual – is recognized. Within this concept, it is tempting also to separate SEPs into two groups – interacting and escaping – and to derive their 'source spectra' from observational data on various flare emissions (protons, gamma rays, neutrons, etc.). By different techniques, those spectra have been reconstructed for 80 solar proton events (SPE) in 1949–1991. In this paper, all available data on the source spectra of solar protons are summarized and revised. We discuss in detail existing uncertainties in the derived spectral indexes, consider other methodological problems involved in this study, and suggest several possible lines for the future investigations of solar flares and SCRs using the source spectrum data. It is noted that some peculiarities of the spectra, for instance, spectral steepening for high energies, may be characteristic of large events of the 23 February 1956 type.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1005190525187
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  • 5
    Electronic Resource
    Electronic Resource
    Lubrication of selected salivary molecules and artificial salivas (1989)
    Springer
    Dysphagia 4 (1989), S. 95-100 
    Details
    ISSN: 1432-0460
    Keywords: Human saliva, lubrication ; Artificial saliva, lubrication ; Saliva, viscosity
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The lubrication regime displayed by human salivas (parotid and submandibular-sublingual), purified salivary molecules (the mucins MG1 and MG2 and α-amylases), and selected artificial salivas (Oracare D, Saliva Substitute, and Orthana) was assessed in vitro using a friction-testing device. Thin-film (boundary) lubrication was observed for all of the salivary samples and two of the artificial salivas examined. Oracare D, a glycerol-based artificial saliva, was the exception since it lubricated by a thick-film (hydrodynamic) regime. On a molar basis, the best lubricants of the purified salivary molecules were MG1 〉 MG2 ≈ nonglycosylated α-amylases ≈ glycosylated α-amylases.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02407152
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  • 6
    Electronic Resource
    Electronic Resource
    A straightforward estimation of the maximum sunspot number for cycle 23 (1999)
    Springer
    Annales geophysicae 17 (1999), S. 639-641 
    Details
    ISSN: 0992-7689
    Keywords: Solar physics ; astrophysics and astronomy (magnetic fields; general)
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract Using the annual number of geomagnetically quiet days (aa 〈 20 γ) for the year after the solar minimum, this precursor method predicts that the maximum sunspot number for cycle 23 will be 140 + 32, indicating that cycle 23 will be similar to cycles 21 and 22.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s00585-999-0639-7
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  • 7
    Electronic Resource
    Electronic Resource
    Geomagnetic activity and wind velocity during the Maunder minimum (1997)
    Springer
    Annales geophysicae 15 (1997), S. 397-402 
    Details
    ISSN: 0992-7689
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract Following a given classification of geomagnetic activity, we obtained aa index values for the Maunder minimum (1645–1715). It is found that the recurrent and fluctuating activities were not appreciable and that the shock activity levels were very low. The aa index level was due almost entirely to the quiet days. Calculated average solar-wind velocities were 194.3 km s−1 from 1657 to 1700 and 218.7 km s−1 from 1700 onwards. Also, the coronal magnetic field magnitude and southward interplanetary magnetic field component Bz were lower. It is concluded that the nearly absent levels of geomagnetic activity during this period were due to lower coronal and Bz magnetic field magnitudes as well as to the continuous impinging on the Earth of a slow wind.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s00585-997-0397-3
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  • 8
    Electronic Resource
    Electronic Resource
    The intense solar activity of march 1989 as a precursor for the occurrence of an ENSO by the end of 1989 (1990)
    Springer
    Solar physics 126 (1990), S. 195-199 
    Details
    ISSN: 1573-093X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract We studied the occurrence of ENSO (El Niño-Southern Oscillation) events in relation to solar activity conditions and we found that the events are distributed in two populations, one that could be associated with low latitude coronal holes which occur along the ascending phase of the cycle and the other one which could be related to polar holes present at the end of the descending phase. As highly anomalous solar activity, in terms of flares and coronal holes, occurred in March of this year, we propose that an ENSO event is likely to occur by the end of the year.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00158307
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  • 9
    Electronic Resource
    Electronic Resource
    Sound and thermal waves propagation in a hydrogen plasma heated by an external radiation field (1990)
    Springer
    Astrophysics and space science 164 (1990), S. 193-211 
    Details
    ISSN: 1572-946X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The thermal equilibrium of a hydrogen plasma heated and ionized by an external radiation field, diluted by a factorW * and defined by an effective temperatureT *, is studied. In addition, the problem of propagation of acoustic and thermal waves in the above plasma model is also analysed. It is found that an external radiation field has stabilizing effects against wave amplification. From the dispersion relation obtained, the phase velocity $$\tilde v$$ for sound and thermal waves and their respective scale-length of damping (or anti-damping) $$\tilde \omega $$ is calculated as a function of the frequency $$\tilde l$$ for representative values of the plasma temperature $$\tilde T$$ and the external radiation fieldT *.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00658824
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  • 10
    Electronic Resource
    Electronic Resource
    Propagating of sound and thermal waves in a reacting fluid (1987)
    Springer
    Astrophysics and space science 137 (1987), S. 1-15 
    Details
    ISSN: 1572-946X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The propagation of linear sound and thermal waves in a reacting fluid, in which the heating and cooling processes can be represented by a heat-loss functionL(ρ, T, ξ is studied. A complex dispersion relation is found, from which the phase velocity and the scale length for damping (or amplification), of the above two-wave mode are calculated Wave amplification may occur in reacting locally stable fluids. Results are applied to a hydrogen plasma model assumed to be heated at a non-specified constant rate and cooled by recombination, excitation, and ionization by collisions, and free-free transitions. The phase velocity $$\tilde l$$ , the scale-length for damping $$\tilde \upsilon$$ , and the relevant relaxation times are calculated as functions of the dimensionless frequency $$\tilde \omega$$ , for temperatures ranging from those at which the hydrogen plasma is neutral to those at which it becomes completely ionized.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00641615
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