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  • 1
    Electronic Resource
    Electronic Resource
    Magnetic sensors with good signal-to-interference discrimination (1983)
    Springer
    Il nuovo cimento della Società Italiana di Fisica 2 (1983), S. 153-165 
    Details
    ISSN: 0392-6737
    Keywords: Biomagnetism (including magnetocardiography) ; Superconducting devices ; superconducting magnets
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Description / Table of Contents: Riassunto Si stabiliscono princípi per il progetto di sistemi di spire che generano campi magnetici distanti che diminuiscono secondo una potenza inversa alta della distanza. Secondo un principio di reciprocità queste disposizioni, quando usate come sensori in magnetometri ad induzione e SQUID, hanno una sensibilità intrinsecamento bassa per sorgenti distanti del campo magnetico.
    Notes: Summary Principles are established for the design of coil arrays which generate distant magnetic fields diminishing as a high inverse power of the distance. By a principle of reciprocity these arrays, when used as sensors in induction and SQUID magnetometers, have an inherently low sensitivity to distant sources of magnetic field.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02455919
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Evaluation of the effects of acid precipitation in eastern Canada using the raison system (1992)
    Springer
    Environmental monitoring and assessment 23 (1992), S. 71-82 
    Details
    ISSN: 1573-2959
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Evaluations have been made of the key chemical factors in the aquatic effects upon surface waters due to acidic precipitation in eastern Canada. The region of Canada east of the Manitoba/Ontario border was divided into 22 aggregates and assessments of inorganic and organic ion chemistry appraised relative to sulphate deposition rates and distributions. Aquatic sensitivity is largely dominated by the concentration, distribution and magnitude of SO inf4 sup2- (sulphate) deposition and by the prevalent geology and derived soils found in each aggregate. The RAISON system provided an adaptable and highly flexible platform to evaluate interactively, multiple data sets of divergent characteristics. Attributes usually associated with geographical information systems are significantly augmented by quantitative numerical and stochastic capabilities that were used extensively in this study.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00406953
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    An airborne far-infrared spectrometer for astronomical observations (1980)
    Springer
    International journal of infrared and millimeter waves 1 (1980), S. 15-25 
    Details
    ISSN: 1572-9559
    Keywords: astronomy ; far-infrared spectroscopy ; Fabry-Perot filters ; fine structure lines
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract A Fabry-Perot spectrometer for airborne observations of astronomical spectral lines has been designed for use in the 50 to 200 μm region of the far-infrared. The spectrometer uses a fixed wavelength Fabry-Perot filter cooled to 4.2 K in conjunction with a high order scanning Fabry-Perot at room temperature. This arrangement provides high spectral resolution and also minimizes the thermal background radiation on the detector. The instrument has been successfully used to study all the presently detected fine structure lines between 50 and 120 μm.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01007063
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Far infrared fine structure lines in the interstellar medium (1980)
    Springer
    International journal of infrared and millimeter waves 1 (1980), S. 609-629 
    Details
    ISSN: 1572-9559
    Keywords: astronomy ; fine structure lines ; far-infrared spectroscopy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Fine structure lines in the far-infrared have many simple properties that make them useful tools for diagnosing astrophysical plasmas. The line ratios are sensitive and accurate probes of density, elemental abundances, and ionization structure. In addition, studies of line shapes and Doppler shifts should prove valuable in studies of the gross dynamics of H II regions and galaxies. We present a review of the theory involved in the interpretation of these lines, and a summary of the observations made so far.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01013471
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  • 5
    Electronic Resource
    Electronic Resource
    A knowledge-based approach to regional acidification modelling (1992)
    Springer
    Environmental monitoring and assessment 23 (1992), S. 83-97 
    Details
    ISSN: 1573-2959
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Data from over 2000 stations and knowledge from experts on atmospheric transport, soil geochemistry, lake chemistry, wetland processes and acidification modelling were assembled in an expert system. The data were grouped by aggregates of tertiary watersheds based on water chemistry knowledge. A set of expert rules was used to determine which of six existing models was most appropriate for a given set of data. Comparison of computed and observed alkalinity indicated median relative errors from 11.3–17.9%, with regression slopes ranging from 0.91–1.18 and regression coefficients between 0.82 and 0.99. The expert model performance was further confirmed with paleolimnological data and other independent sets of data. The sensitivity of the predicted alkalinity was illustrated by changing some of the rules. Given that the rules were acceptable by experts and produced reasonable agreement with observations, the knowledge-based system seemed a viable approach to the impact assessment of acidic deposition.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00406954
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    Paper (German National Licenses)
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