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  • external fields  (1)
  • regularity-preserving transformations  (1)
  • Springer  (2)
  • MDPI Publishing
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  • Springer  (2)
  • MDPI Publishing
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  • 1
    Electronic Resource
    Electronic Resource
    Regular-like tree expressions (1983)
    Springer
    International journal of parallel programming 12 (1983), S. 1-11 
    Details
    ISSN: 1573-7640
    Keywords: Trees ; regular expressions ; expansive tree grammars ; regularity-preserving transformations ; context-free languages
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science
    Notes: Abstract Regular-like expressions provide a compact notation for the explicit description of context-free languages. In this paper we extend these concepts by establishing a one-to-one correspondence between expansive tree languages and regular-like sets of trees. Algorithms are developed for constructing an expansive tree grammar whose language is defined by a given regular-like tree (RLT) expression, and vice versa. These results are then used to obtain RLT equations that describe sets of tree resulting from regularity-preserving transformations associated with three types of errors commonly found in practice.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00996800
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  • 2
    Electronic Resource
    Electronic Resource
    Characterisation of soil-oxide analogs by applied-field 57Fe Mössbauer spectroscopy (1998)
    Springer
    Hyperfine interactions 117 (1998), S. 245-270 
    Details
    ISSN: 1572-9540
    Keywords: Al-substituted iron oxides ; Mössbauer spectroscopy ; external fields
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract In this contribution, the effect of high external magnetic fields upon the Mössbauer spectra of aluminous α- and γ-Fe2O3, of aluminous α- and γ-FeOOH and of aluminous Fe3O4 is reviewed. It is shown that the shapes of these spectra are characteristic of these materials and also to some extent of their crystallinities and Al-for-Fe substitutions. Based upon this evaluation, the potential for application of external-field Mössbauer spectroscopy to soil-related analytical purposes is demonstrated for two soil samples. Limitations of the technique are discussed. Finally, some suggestions for further research in this field are indicated.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1012643326691
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