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  • 1
    Electronic Resource
    Electronic Resource
    Small silver particles in glass surface layers produced by sodium-silver ion exchange — their concentration and size depth profile (1991)
    Springer
    The European physical journal 20 (1991), S. 309-311 
    Details
    ISSN: 1434-6079
    Keywords: 82.70 ; 61.40.D ; 78.00
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Small spherical silver particles in a surface layer of commercial flat glass were produced by means of sodium-silver ion exchange. In each volume element of the layer there is a Gaussian distribution of the particle diameters. The mean diameter increases with penetration depth. Within one individual sample it can vary from 4.5 nm immediately at the glass surface up to more than 50 nm at the end of the layer. Due to a special preparation technique the results were gained by microspectrophotometric measurements as well as by investigations carried out with the transmission electron microscope and the electron-probe microanalyzer on one and the same sample always as function of the penetration depth.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01543998
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  • 2
    Electronic Resource
    Electronic Resource
    Aggregates of small silver particles in surface layers of glasses — electron microscopy and optical microspectroscopy (1991)
    Springer
    The European physical journal 20 (1991), S. 313-315 
    Details
    ISSN: 1434-6079
    Keywords: 82.70 ; 61.40.D ; 78.00
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract In glasses containing antimony or arsenic in the order of 1 weight-% the treatment with a silver-containing paste yields a dark-red surface layer. Transmission electron microscopy shows that there are aggregates of spherical silver particles in the coloured layer. Optical microspectroscopy proves extinction spectra consisting of two bands. Comparing these spectra with calculated ones reveals that the two bands can be explained by the existence of aggregates. The change of the extinction within the coloured layer is a result of the mutually different spatial arrangements of the silver particles which were found by electron microscopy.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01543999
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  • 3
    Electronic Resource
    Electronic Resource
    Vibration problems using isoparametric shell elements (1972)
    Chichester [u.a.] : Wiley-Blackwell
    International Journal for Numerical Methods in Engineering 5 (1972), S. 142-145 
    Details
    ISSN: 0029-5981
    Keywords: Engineering ; Engineering General
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mathematics , Technology
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/nme.1620050114
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  • 4
    Electronic Resource
    Electronic Resource
    Pure moment loading of axisymmetric finite element models (1973)
    Chichester [u.a.] : Wiley-Blackwell
    International Journal for Numerical Methods in Engineering 5 (1973), S. 459-463 
    Details
    ISSN: 0029-5981
    Keywords: Engineering ; Engineering General
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mathematics , Technology
    Notes: A method of loading axisymmetric finite element models by application of a uniform circumferentially distributed moment is presented herein. Operationally, this is accomplished by changing the radius of curvature of some reference point in the axisymmetric model. The radius change gives rise to hoop strains, which are used in an ‘initial strain’ method to actually load the model. The resulting pure axisymmetric moment is computed by integrating the hoop stresses thus generated over a cross-sectional cut through the axisymmetric model. For non-linear problems, the procedure just described can be performed incrementally. Several numerical examples are presented herein to illustrate the method, such as bending of a curved bar, sharp folding of a thin sheet and bending of a toroidal tube until the cross-section is flattened.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/nme.1620050403
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  • 5
    Electronic Resource
    Electronic Resource
    An out-of-core equation solver for full, unsymmetric matrices (1978)
    Chichester [u.a.] : Wiley-Blackwell
    International Journal for Numerical Methods in Engineering 12 (1978), S. 721-725 
    Details
    ISSN: 0029-5981
    Keywords: Engineering ; Engineering General
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mathematics , Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/nme.1620120415
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  • 6
    Electronic Resource
    Electronic Resource
    A drafting program for isoparametric finite elements (1978)
    Chichester [u.a.] : Wiley-Blackwell
    International Journal for Numerical Methods in Engineering 12 (1978), S. 505-529 
    Details
    ISSN: 0029-5981
    Keywords: Engineering ; Engineering General
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mathematics , Technology
    Notes: Considerable effort has been invested lately in the application of isoparametric finite elements for numerical solution of a wide range of applied mechanics problems. In fact, several general purpose computer programs are now available which are based upon such finite elements. In the present paper, a new application of the isoparametric finite element concept is introduced which significantly extends its usefulness for many practical structural configurations. In this application, final working or architectural drawings of the structure are made from the same (or similar) finite element model as was utilized in a structural integrity analysis. The hardware necessary to produce such drawing, a computer driven plotter or automated drafting machine, is available commercially or through most data centres, and the software concepts required are described herein.
    Additional Material: 18 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/nme.1620120311
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