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  • 11
    Electronic Resource
    Electronic Resource
    Results of the DEKORP 1 (BELCORP-DEKORP) deep seismic reflection studies in the western part of the Rhenish Massif (1991)
    Oxford, UK : Blackwell Publishing Ltd
    Geophysical journal international 106 (1991), S. 0 
    Details
    ISSN: 1365-246X
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences
    Notes: Within the DEKORP project (DEKORP: Deutsches Kontinentales Reflexionsseismisches Programm) a joint deep seismic reflection venture with the BELCORP (Belgian Continental Reflection Seismic Programme) group of the Belgian Geological Survey was carried out in 1987 across the Rhenish Massif, a part of the mid-European Variscides. This orogenic belt developed in the Upper Devonian/Carboniferous. Mostly Devonian rocks crop out at the surface. The Rhenish Massif is bordered by two sedimentary troughs: the sub-Variscan Foredeep in the north and the Permo-Carboniferous Saar-Nahe Basin in the south. In the east-west direction it is subdivided by the axial depression of the Eifel Nord-Süd Zone.The aim of the survey which totals almost 220 km of seismic profiling, was to investigate the crustal structure of the western part of the Rhenish Massif and to compare it with the line DEKORP 2-N which crosses the eastern portion of the massif. The results indicate the presence of NW-vergent tectonics of various styles that can often be traced down to deep parts of the crust. Horizontal Variscan compression plays a dominant role in the northern part while post-Variscan extension seems to dominate in the Saar-Nahe Basin, although even there traces of Variscan compression seem to be preserved in the middle crust. Common characteristics of the pre-Palaeozoic basement, differences between the western and eastern parts of the Rhenish Massif, and the deep extension of the Aachen Thrust (Faille du Midi) have been clearly observed. This prominent thrust in the north with its characteristic ramp and flat structure has been followed over 100 km length down
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-246X.1991.tb04612.x
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  • 12
    Electronic Resource
    Electronic Resource
    Elastic electron deuteron scattering on a tensor polarized solid ND3 target (1991)
    Springer
    The European physical journal 49 (1991), S. 175-185 
    Details
    ISSN: 1434-6052
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Elastic electron deuteron scattering has been measured at the Bonn 2.5 GeV electron-synchrotron using a tensor polarized ND3 target. The scattered electrons and deuterons were detected in coincidence by two magnetic spectrometers. Data were taken at an average value of four momentum transfer ofQ 2=0.495 (GeV/c)2 in order to separate the electric monopole and quadrupole form factors of the deuteron. To have a sufficient control of systematic effects, both polarized and unpolarized cross sections were measured with an identical experimental set up. In the ratioR EXP=dσpol/dσunp systematic effects are expected to cancel. This ratioR EXP is related to the theoretical polarized cross section d dσ T where the spin quantization axis for the deuterons is orientated in the ed-scattering plane, perpendicular to the virtual photon direction. Our final result for the corresponding recoil tensor polarization ist 20=−2.01±1.13.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01555492
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  • 13
    Electronic Resource
    Electronic Resource
    Allgemeines (1931)
    Springer
    Journal of cancer research and clinical oncology 34 (1931), S. 81-84 
    Details
    ISSN: 1432-1335
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01618265
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  • 14
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    Unknown
    Boos, M.: Die Wissenschaftstheorie Carl Mengers/The Philosophy of Science of Carl Menger (Book Review) (1990)
    Wien : Periodicals Archive Online (PAO)
    Journal of economics/Zeitschrift für Nazionalökonomie. 51 (1990) 110 
    Details
    ISSN: 0931-8658
    Topics: Economics
    Notes: Book Reviews
    URL: http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&res_dat=xri:pao:&rft_dat=xri:pao:article:4223-1990-051-00-000015
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  • 15
    Electronic Resource
    Electronic Resource
    Comparison of skin pH in domesticated and laboratory mammals (1991)
    Springer
    Archives of dermatological research 283 (1991), S. 16-18 
    Details
    ISSN: 1432-069X
    Keywords: Skin pH ; Domestic mammals ; Laboratory animals
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01207245
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  • 16
    Electronic Resource
    Electronic Resource
    Histochemical aspects of stratum corneum function in the feline foot pad (1990)
    Springer
    Archives of dermatological research 281 (1990), S. 541-543 
    Details
    ISSN: 1432-069X
    Keywords: Histochemistry ; Stratum corneum ; Foot pad function ; Cats
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00412742
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  • 17
    Electronic Resource
    Electronic Resource
    Electrical characterization of defects introduced in n-GaAs by alpha and beta irradiation from radionuclides (1993)
    Springer
    Applied physics 56 (1993), S. 547-553 
    Details
    ISSN: 1432-0630
    Keywords: 81.40.Rs ; 61.80.−X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract We investigated defect production in n-type GaAs with two different free-carrier densities (4×1014 and 1×1016/cm3) by using particles liberated from radionuclides. 90Sr and 241Am were employed as beta and alpha sources, respectively. The results obtained for electron irradiation showed that the same set of primary defects can be produced by beta irradiation from the Sr source as by electrons produced in an accelerator. Similarly, the defects produced by alpha irradiation from the Am source closely resemble those introduced by alpha irradiation in a Van de Graaff accelerator. It was found that the relative concentrations of the primary defects in electron-irradiated GaAs are different to those in alpha-particle irradiated GaAs. Further, for the first time, an alpha irradiation induced defect which seems to be related to the doping concentration was observed in the 1016/cm3 Si doped GaAs. It is concluded that the use of radionuclides is an inexpensive and convenient method to introduce and to study radiation induced defects in semiconductors.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00331403
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  • 18
    Electronic Resource
    Electronic Resource
    Dynamische Kurzschlußbeanspruchung in Gleichstromanlagen (1991)
    Springer
    Electrical engineering 74 (1991), S. 305-313 
    Details
    ISSN: 1432-0487
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology
    Description / Table of Contents: Contents The time patterns of short-circuit currents and therefore of the electromagnetic short-circuit forces in DC bus systems are very manifold; they only can be expressed by use of several parameters. For each of these patterns a substitute time function can be determined (rectangle or sinussquare) which causes about the same maximum instantaneous value of mechanical strength, like the original electromagnetic force, if the short-circuit duration is less than the half period of the mechanical oscillation. After suitable modification the rectangle function can also be used if the short-circuit duration is greater than the half period of the mechanical oscillation.
    Notes: Übersicht Die Zeitverläufe der Kurzschlußströme und daher auch der elektromagnetischen Kurzschlußkräfte in Gleichstromanlagen sind sehr vielfältig und können nur mit einer größeren Anzahl von Parametern beschrieben werden. Für jeden dieser Verläufe kann eine einfache Ersatzfunktion — Rechteck oder Sinusquadrat — bestimmt werden, die annähernd den gleichen maximalen Momentanwert der mechanischen Beanspruchung wie die ursprüngliche elektromagnetische Kraft verursacht, wenn die Kurzschlußdauer kleiner als die halbe mechanische Periodendauer ist. Nach geeigneter Modifikation kann das Ersatzrechteck auch dann verwendet werden, wenn die Kurzschlußdauer größer ist als die halbe mechanische Periodendauer.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01573906
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  • 19
    Electronic Resource
    Electronic Resource
    Performance Analysis in Positron Annihilation Methods (1992)
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 105-110 (Jan. 1992), p. 1905-1910 
    Details
    ISSN: 1662-9752
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/59/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.105-110.1905.pdf
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  • 20
    Electronic Resource
    Electronic Resource
    Models for estimating capillary rise in a heavy clay soil with a saline shallow water table (1992)
    Springer
    Irrigation science 13 (1992), S. 1-7 
    Details
    ISSN: 1432-1319
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Shallow saline water tables underlie large areas of the clay soils in the Murray basin of Australia. Accurate estimation of capillary rise is important in formulating management strategies to avoid degradation of such soils. Measured capillary rise from a saline water table was compared with capillary rise estimated by three mathematical models of varying complexity and input requirement. A quasi steady state analytical model (QS-SAM), a transient state analytical model (TSAM) and a numerical model (NM) were used. An undisturbed heavy clay soil core of 0.75 m diameter and 1.4m deep was subjected to a static saline water table at 1.2 m from the surface. A wheat crop was grown on the core and the weekly capillary rise from the water table was measured. The electrical conductivity of a 1:2 soil: water extract was determined at 0.15 m depth intervals before and 21 weeks after the introduction of the saline water table. The QSSAM did not satisfactorily estimate the initial wetting of the subsoil and the estimated capillary rise was considerably lower than the measured values. Capillary rise estimated by the TSAM was reasonably close to the measured values, but the weekly rates fluctuated considerably. The NM estimated capillary rise quite satisfactorily throughout the experiment. Except near the soil surface, the electrical conductivity values estimated by the NM were close to the measured values. For estimating total capillary rise over large areas, the TSAM is preferred over the NM because of its fewer input requirements and shorter execution time.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00190238
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