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  • 11
    Electronic Resource
    Electronic Resource
    The Pauli exclusion effect in multiparticle and hole state densities (1988)
    Springer
    The European physical journal 329 (1988), S. 69-76 
    Details
    ISSN: 1434-601X
    Keywords: 21.10.Ma ; 25.70.Gh
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract A method to calculate the effect of the Pauli exclusion principle in multiparticle and hole state densities is proposed. The model-independent method can be essentially extended to any multi-fermion system. For an application to the exciton model, both the strict expression of state densities and the exact Pauli exclusion correction have been obtained in the equidistant spacing model. The enhancement of the exact Pauli exclusion correlation implies that the Pauli exclusion principle plays a quite important role in state densities.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01294817
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  • 12
    Electronic Resource
    Electronic Resource
    The use of silane coupling agents in ceramic injection moulding (1988)
    Springer
    Journal of materials science 23 (1988), S. 2115-2120 
    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 Ceramic injection-moulding blends containing 56 vol % fine silicon nitride and 65 vol % coarse silicon powder in a polypropylene and wax vehicle were prepared by dispersive mixing with and without 2 p.p.h. silane coupling agent based on the weight of powder. The addition of silane reduced the viscosity and the pseudoplasticity of the suspensions considerably. The mechanical strength of the moulding compositions, which may influence the tendency to crack during solidification in the cavity, was marginally increased. The treated silicon powder was strongly hydrophobic but this was not the case with the silicon nitride powder.[/p]
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01115777
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  • 13
    Electronic Resource
    Electronic Resource
    Post-buckling analysis of shallow shells by the field-boundary-element method (1988)
    Chichester [u.a.] : Wiley-Blackwell
    International Journal for Numerical Methods in Engineering 26 (1988), S. 571-587 
    Details
    ISSN: 0029-5981
    Keywords: Engineering ; Engineering General
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mathematics , Technology
    Notes: The non-linear field-boundary-element technique is applied to the analysis of snap-through phenomena in thin shallow shells. The equilibrium path is traced by using the arc-length method and the solution strategy is discussed in detail. The results show that, as compared to the approaches based on the popular symmetric-variational Galerkin finite element formulation, the current approach based on an unsymmetric variational Petrov-Galerkin field-boundary-element formulation gives a faster convergence while using fewer degrees of freedom. The illustrative numerical examples deal with post-buckling responses of several shallow shells with different geometries.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/nme.1620260305
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  • 14
    Electronic Resource
    Electronic Resource
    Chemical modification in mass spectrometry IV - 2-alkenyl-4,4-dimethyloxazolines as derivatives for the double bond location of long-chain olefinic acids (1988)
    Chichester : Wiley-Blackwell
    Biological Mass Spectrometry 15 (1988), S. 33-44 
    Details
    ISSN: 0887-6134
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Long-chain unsaturated fatty acids (UFA) can easily be converted on a microgram scale to the corresponding 2-alkenyl-4,4-dimethyloxazolines by condensation with 2-amino-2-methylpropanol (AMP). These modified molecules with a ‘hidden’ carboxyl group have been proved to be a class of useful derivatives for gas chromatography/mass spectrometry (GC/MS) of UFA mixtures. While possessing very good GC characteristics, the title compounds show regular, well-recognizable diagnostic ion peaks of the double bond position in the chain. Detailed description of the method as well as electron impact (E1) mass spectra of derivatives resulting from mono-, di and polyenoic (maximally containing six double bonds) acids are presented.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bms.1200150106
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  • 15
    Electronic Resource
    Electronic Resource
    Slow relaxation of the spin doublet decamethylferrocenium cation as a probe for spin on organo-polycyanides, new organoferromagnets (1988)
    Springer
    Hyperfine interactions 42 (1988), S. 1099-1102 
    Details
    ISSN: 1572-9540
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The contributions of Mössbauer spectroscopy and susceptibility studies to the discovery of a variety of new and some cases unprecedented magnetic behavior in polymeric charge transfer salts are highlighted. The materials are based on electron transfer from decamethylferrocene to polycyanide electron acceptors.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02395583
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  • 16
    Electronic Resource
    Electronic Resource
    High-resolution electron microscopy of high-temperature superconductors (1988)
    New York, NY : Wiley-Blackwell
    Journal of Electron Microscopy Technique 8 (1988), S. 297-306 
    Details
    ISSN: 0741-0581
    Keywords: Defects ; Polymorphs ; Structure ; Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Natural Sciences in General
    Notes: We review recent results obtained at Northwestern using high-resolution electron microscopy to study high-temperature superconductors. While in general these materials form large, very perfect single crystal grains which display very few imperfections, there is also evidence of slip defects, amorphous regions, and order-disorder transformations. We also report that the gadolinium-based superconductors and in one case yttrium-based superconductors show evidence for some copper solid solubility in the form of copperrich planar defects. The structure of a metastable trigonal polytype is also reported, as are the effects of electron beam and water vapor damage to the materials.
    Additional Material: 9 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jemt.1060080308
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