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  • Springer  (27)
  • Molecular Diversity Preservation International  (1)
  • Seismological Society of America  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Book review (1991)
    Springer
    Pure and applied geophysics 135 (1991), S. 639-655 
    Details
    ISSN: 1420-9136
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01772412
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  • 2
    Electronic Resource
    Electronic Resource
    Effect of recycled plastic and compound additives on the properties of an injection-moulded polypropylene co-polymer (1982)
    Springer
    Journal of materials science 17 (1982), S. 1915-1924 
    Details
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract The falling-dart impact test and micromorphology studies have been used to investigate the effect of recycled material, pigments, ultra-violet stabilizer and co-polymer molecular weight on the properties of injection mouldings. Together with the results presented in Parts 1 to 3 the new results show that the spherulite morphology and impact properties are markedly dependent on compound formulation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00540407
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  • 3
    Electronic Resource
    Electronic Resource
    Transformation between SLR/VLBI and WGS-84 reference frames (1995)
    Springer
    Journal of geodesy 69 (1995), S. 61-72 
    Details
    ISSN: 1432-1394
    Source: Springer Online Journal Archives 1860-2000
    Topics: Architecture, Civil Engineering, Surveying
    Notes: Abstract In geodetic and geophysical applications of GPS, it is important to realize the ephemerides of the GPS satellites and the coordinates of station positions in a consistent reference system. At present, more than one reference system is being used by various GPS users depending on their specific applications. The WGS-84 and various reference frames based on satellite laser ranging (SLR), very long baseline interferometry (VLBI), or a combination of SLR and VLBI are the most commonly used in high precision geophysical applications. The WGS-84 is widely used in applications which rely on the GPS broadcast ephemeris. Station coordinates estimated in one system may have to be transformed to another for further use or for evaluation/comparison purposes. This paper presents a seven-parameter transformation between the WGS-84 and SLR/VLBI reference frames. The GPS double-differenced phase measurements for two consecutive weeks from a set of five Defense Mapping Agency (DMA) sites (defined in the WGS-84 frame) and from an augmented set of fifteen CIGNET sites (defined in the SLR/VLBI frame) were processed in a least squares estimation scheme to determine station coordinates, from which the transformation parameters were determined. A scale difference of about 0.2 ppm and an orientation difference in longitude of about 31 milliarcseconds were found to be the only parameters of significance between the adopted SLR/VLBI and the WGS-84 frames. Transformation between WGS-84 and the ITRF90 is also included, in which the scale difference is the same as before but the longitude rotation is about 16 mas.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00819552
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  • 4
    Electronic Resource
    Electronic Resource
    Locating a point on a spherical surface relative to a spherical polygon of arbitrary shape (1989)
    Springer
    Mathematical geology 21 (1989), S. 811-828 
    Details
    ISSN: 1573-8868
    Keywords: Spherical ; polygon ; locate ; sort ; algorithm ; FORTRAN ; subroutine
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Mathematics
    Notes: Abstract An algorithm for determining if any given point,P, on the surface of a sphere is located inside, outside, or along the border of an arbitrary spherical polygon,S, is described. The polygon is described by specifying coordinates of its vertices, and coordinates of some pointX which is known to lie withinS. The algorithm is based on the principle that an arc joiningX andP will cross the border ofS an odd number of times ifP lies outsideS, and an even number of times ifP lies withinS. The algorithm has been implemented as a set of FORTRAN subroutines, and a listing is provided. The algorithm and subroutine package can be used with spherical polygons containing holes, or with composited spherical polygons.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00894449
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  • 5
    Electronic Resource
    Electronic Resource
    Reply to comments by Douglas M. Hawkins (1991)
    Springer
    Mathematical geology 23 (1991), S. 1087-1088 
    Details
    ISSN: 1573-8868
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Mathematics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02066114
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  • 6
    Electronic Resource
    Electronic Resource
    Computing the area of a spherical polygon of arbitrary shape (1987)
    Springer
    Mathematical geology 19 (1987), S. 335-346 
    Details
    ISSN: 1573-8868
    Keywords: spherical ; polygon ; area ; algorithm ; FORTRAN ; subroutine
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Mathematics
    Notes: Abstract An algorithm for determining the area of a spherical polygon of arbitrary shape is presented. The kernel of the problem is to compute the interior angle at each vertex of the spherical polygon; a well-known relationship between the area of a spherical polygon and the sum of its interior angles then may be exploited. The algorithm has been implemented as a FORTRAN subroutine and a listing is provided. Both algorithm and subroutine are general in their capabilities and can be used, for example, to determine the area of a spherical polygon containing one or more holes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00897843
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  • 7
    Electronic Resource
    Electronic Resource
    Computing relative plate velocities: A primer (1987)
    Springer
    Mathematical geology 19 (1987), S. 561-569 
    Details
    ISSN: 1573-8868
    Keywords: relative plate velocity ; Euler's theorem ; computation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Mathematics
    Notes: Abstract Standard models of present-day plate motions are framed in terms of rates and poles of rotation, in accordance with the well-known theorem due to Euler. This article shows how computation of relative plate velocities from such models can be viewed as a simple problem in spherical trigonometry. A FORTRAN subroutine is provided to perform the necessary computations.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00896921
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  • 8
    Electronic Resource
    Electronic Resource
    Effect of recycled plastic and compound additives on the properties of an injection-moulded polypropylene co-polymer (1981)
    Springer
    Journal of materials science 16 (1981), S. 3335-3345 
    Details
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract Micromorphology studies and a falling-dart impact test have been used to investigate the effect of recycled material and pigments on the properties of an injection-moulded polypropylene co-polymer. The use of some pigments have been shown to have a more deleterious effect upon impact properties than that which occurs when recycled material is used as feedstock. The results have been partly explained in terms of changes in micromorphology which accompany the addition of pigments and recycled material to the feedstock.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00586295
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  • 9
    Electronic Resource
    Electronic Resource
    The effect of recycled plastic and compound additives on the properties of an injection-moulded polypropylene co-polymer (1980)
    Springer
    Journal of materials science 15 (1980), S. 2843-2860 
    Details
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract Microstructure studies on injection-moulded plaques and the falling dart impact test method have been used to investigate the effect of incorporating recycled material as feedstock on the micromorphology and mechanical properties of polypropylene co-polymer injection-mouldings. It has been shown that marked and systematic changes in mould dimension reproducability and mechanical properties do occur with increasing percentage of recycled materials, and that the results can be explained in terms of changes in rheological properties and accompanying changes in micromorphology.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00550554
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  • 10
    Electronic Resource
    Electronic Resource
    The effect of recycled plastic and compound additives on the properties of an injection-moulded polypropylene co-polymer (1980)
    Springer
    Journal of materials science 15 (1980), S. 2834-2842 
    Details
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract A comprehensive analysis of the effects of recycled material, recommended pigments, pigment concentration, and selected stabilizers on the microstructure and impact properties of a polypropylene co-polymer has been undertaken. This paper reports on the study materials, which includes details of more than sixty compounds used in the investigation, and the experimental methods which were used to characterize the injection-moulded specimens to be reported in the following parts of this work.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00550553
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