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  • Articles  (862)
  • Springer  (853)
  • National Academy of Sciences  (9)
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  • 1
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    Abstracts of the 6th FECS Conference 1998 Lectures (1998)
    Springer
    Details
    Publication Date: 1998-09-01
    Print ISSN: 0944-1344
    Electronic ISSN: 1614-7499
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Published by Springer
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    PAPER CURRENT
  • 2
    Electronic Resource
    Electronic Resource
    A recurrence for Dirichlet problems (1982)
    Springer
    Computing 28 (1982), S. 65-68 
    Details
    ISSN: 1436-5057
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science
    Description / Table of Contents: Zusammenfassung Die formale Integration der Differential-Gl. zu einer Integral-Gl. ermöglicht die iterative Berechnung einer Klasse von kernspezifischen „Grund”-Funktionen, aus denen sich die Lösung des Randwertproblems linear aufbauen läßt.
    Notes: Abstract The formal integration of the differential eq. to an integral equation allows the iterative construction of a class of “basic” functions which, characterized by the kernel, are suitable for developing the solution to the boundary value problem.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02237996
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  • 3
    Electronic Resource
    Electronic Resource
    Crystal and molecular structure of chloramphenicol (1979)
    Springer
    Journal of chemical crystallography 9 (1979), S. 295-304 
    Details
    ISSN: 1572-8854
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract Chloramphenicol, C11H12Cl2N2O5, is orthorhombic, space groupC2221,a = 17.495(3),b = 7.321(2),c = 22.130(4) Å, andZ = 8. The structure was solved by direct methods and refined to a finalR value of 0.068 for 1186 counter-reflections. Estimated standard deviations for bond lengths and bond angles involving nonhydrogen atoms average 0.009 Å and 0.6 °, respectively. All the hydrogen atoms that are bonded to O or N and are available for hydrogen-bond formation take part in the hydrogen-bonding network. The crystals become brown in color on prolonged exposure to X-rays and γ-rays. Our structural investigation with colored crystal does not indicate any structural change.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01200521
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  • 4
    Electronic Resource
    Electronic Resource
    Dielektrische Wellenleiter als Plasmasonden (1967)
    Springer
    The European physical journal 200 (1967), S. 541-555 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract A microwave interferometer is described, by which the electron density in a small volume inside of a plasma can be measured. By dielectric rods acting as waveguides the microwave is led to this volume. For a given electron density the phase shift is calculated for this volume and for the dielectric rods. By a suitable choice of the radius and the dielectric constant of the rods the phase shift along the rods can be surpressed. The influence of plasma sheaths is discussed. In a special application to the plasma of the negative glow these interferometric measurements are compared with Langmuir probe measurements.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01326244
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  • 5
    Electronic Resource
    Electronic Resource
    Systematic study of impact parameter dependent K-vacancy probabilities in near symmetric gas- and solid-target collision systems (1984)
    Springer
    The European physical journal 316 (1984), S. 5-14 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract K-vacancy production probabilitiesP K (b) were measured with gas and solid targets byK-x-ray particle coincidences (impact parameterb is determined by the particle detection angle) in the region of light (Z P ≃Z T ≃10) up to intermediate heavy (Z P ≃Z T ≃36) collision systems. The measuredP K (b) reveal a very strong difference in shape between solid and gas targets independent ofZ. Only theP K (b) measured with gas targets and those measured with solid targets at very small impact parameters show reasonable good agreement with the 2pπ x-2pσ rotational coupling model. At largeb theP K (b) from solid targets are strongly influenced by a multiple collision effect, where projectileL-vacancies seem to be produced in collisions beforeK-vacancy production. However, this effect cannot be understood just by a two collision process whereL-vacancy production and 2pπ x-2pσ rotational coupling occurs in consecutive collisions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01415654
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  • 6
    Electronic Resource
    Electronic Resource
    Striations als Eigenlösungen der Elektronenbewegung im elektrischen Feld (1973)
    Springer
    The European physical journal 263 (1973), S. 299-314 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract A simple model for the motion of electrons in an inhomogeneous electric field is derived. With this model the striations in a weakly ionized low pressure discharge can be explained as a phenomenon of the energy relaxation. In a periodical electric field resonances occur, for which the voltage across one striation equals the average energy gain of an electron between two inelastic collisions, divided by an integer. These resonances are recognized as eigensolutions in the homogeneous field. The influence of the elastic and ineiastic collisions on the damping of the striations is discussed. In a first approximation the energy loss at the elastic collisions can be taken into account by a frictional contribution to the voltage across one striation. This voltage and the energy distribution function in moving striations are calculated and compared with measurements of other authors.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01391589
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  • 7
    Electronic Resource
    Electronic Resource
    Örtliche Relaxation der Elektronen-Energieverteilung in hohen elektrischen Feldern (1974)
    Springer
    The European physical journal 268 (1974), S. 157-163 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The motion of electrons in high electric fields is of particular interest due to its special experimental phenomena and its problems in theoretical treatment. We examine the spatial relaxation of electron energy distributions theoretically and experimentally. In the theory we assume a negligible elastic energy loss and a simple model for the inelastic collisions. The distribution function can be separated in two factors depending either on the kinetic energyε or on the total energyX=g3+Φ (Φ: potential energy). In application to the energy relaxation we calculate the relaxation of a humped initial energy distribution to a smoothed equilibrium distribution. The corresponding experiment was performed in the positive column of an argon plasma at a pressure of 3.6 · 10−3 Torr. We measured the electron energy distribution as a function of distance from the cathode with a Langmuir probe using the second derivative method. Good agreement was found between the experimental and theoretical distributions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01669873
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  • 8
    Electronic Resource
    Electronic Resource
    Theorie der „Retrograde Motion“ (1958)
    Springer
    The European physical journal 151 (1958), S. 577-594 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Zusammenfassung Neuere Untersuchungen der „Retrograde Motion“ liefern interessantes experimentelles Material über die rückläufige Geschwindigkeit und die Lage des kritischen Punktes in Abhängigkeit von den verschiedenen Parametern (Stromstärke, Magnetfeld, Druck usw.). Bisher liegt keine Berechnung dieser Beobachtungen vor; verschiedene Modellvorstellungen zur Deutung des Effekts haben sich bei näherer Prüfung als unzureichend erwiesen. Wie eine sorgfältige Diskussion der Kathodenmechanismen zeigt, ist „Retrograde Motion“ bei dem stark kontrahierten, feldbestimmten Ansatz zwangsläufig zu erwarten. Von entscheidender Bedeutung ist hierbei einerseits die gegenseitige Abhängigkeit von Ionen- und Elektronenerzeugung, andererseits die Kopplung der Bewegung der Ladungsträger. Die rechnerische Ausführung erreicht in den wesentlichen Punkten Übereinstimmung mit den Experimenten.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01338428
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  • 9
    Electronic Resource
    Electronic Resource
    Elastische und unelastische Streuung von Deuteronen an C, Mg, Ti, Fe, Ni, Cu und Zn bei 11,8 MeV (1961)
    Springer
    The European physical journal 161 (1961), S. 509-524 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The spectra of deuterons scattered from C, Mg, Ti, Fe, Ni, Cu and Zn have been measured in steps of 5° betweenΘ lab=20° and 165°. The excitation of the lowest levels is in most nuclei strongly preferred and only very few low energy deuterons were observed. The angular distributions of the elastic and inelastic scattering of deuterons show pronounced diffraction maxima which are partly correlated. The correlation is compared with the Blair-model.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01341549
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  • 10
    Electronic Resource
    Electronic Resource
    Superconductivity in oxides: toward a unified picture (1989)
    Springer
    The European physical journal 76 (1989), S. 17-24 
    Details
    ISSN: 1434-6036
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract We present a combined overview of current experimental knowledge and theoretical understanding of high temperature superconductivity based on the charge transfer excitation model. Our model is capable of rationalizing a great variety of experimental information and suggests directions to follow in designing even higherT c materials.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01323483
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