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  • 06A10  (2)
  • Alnus rubra  (1)
  • Electromagnetic nondestructive evaluation (NDE)  (1)
  • Springer  (4)
  • American Association for the Advancement of Science (AAAS)
  • Cell Press
  • Periodicals Archive Online (PAO)
  • 1985-1989  (4)
  • 1965-1969
Collection
Keywords
Publisher
  • Springer  (4)
  • American Association for the Advancement of Science (AAAS)
  • Cell Press
  • Periodicals Archive Online (PAO)
Years
Year
  • 1
    Electronic Resource
    Electronic Resource
    On the dimensions of ordered sets of bounded degree (1986)
    Springer
    Order 3 (1986), S. 15-20 
    Details
    ISSN: 1572-9273
    Keywords: 06A10 ; Partially ordered set
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Notes: Abstract Let P be a partially ordered set. Define k = k (P) = max p∈ |{x ∈ P : p 〈 x or p = x}|, i.e., every element is comparable with at most k others. Here it is proven that there exists a constant c (c 〈 50) such that dim P 〈 ck(log k)2. This improves an earlier result of Rödl and Trotter (dim P ≤2 k 2+2). Our proof is nonconstructive, depending in part on Lovász' local lemma.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00403406
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Dimension versus size (1988)
    Springer
    Order 5 (1988), S. 17-20 
    Details
    ISSN: 1572-9273
    Keywords: 06A10 ; 06A23 ; Lattice ; order dimension ; least size
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Notes: Abstract We investigate the behavior of f(d), the least size of a lattice of order dimension d. In particular we show that the lattice of a projective plane of order n has dimension at least n/ln(n), so that f(d)=O(d) 2 log2 d. We conjecture f(d)=θ(d 2 ), and prove something close to this for height-3 lattices, but in general we do not even know whether f(d)/d→∞.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00143893
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  • 3
    Electronic Resource
    Electronic Resource
    Boundary integral equation methods for two-dimensional models of crack-field interactions (1988)
    Springer
    Journal of nondestructive evaluation 7 (1988), S. 3-14 
    Details
    ISSN: 1573-4862
    Keywords: Electromagnetic nondestructive evaluation (NDE) ; crack detection ; eddy currents ; boundary integral equations ; boundary element method
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology , Mathematics
    Notes: Abstract An introduction to the application of surface integral equation methods to the calculation of eddy current-flaw interactions is presented. Two two-dimensional problems are presented which are solved by the boundary integral equation method. Application of collocation methods reduces the problems to systems of linear algebraic equations. The first problem is that of a closed surface crack in a flat slab with an AC magnetic field parallel to the plane of the crack. The second is that of av-groove crack in the AC field of a pair of parallel wires placed parallel to the vertex of the crack. In both cases, maps of the current densities at the surface are displayed, as well as the impedance changes due to the cracks.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00565772
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  • 4
    Electronic Resource
    Electronic Resource
    Identification of indole compounds secreted byFrankia HFPArI3 in defined culture medium (1989)
    Springer
    Plant and soil 118 (1989), S. 205-209 
    Details
    ISSN: 1573-5036
    Keywords: actinorhizal ; Alnus rubra ; auxin ; Frankia ; IAA ; indole-3-acetic acid ; indole-3-ethanol ; nodule secretion ; phytohormone
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Indole compounds secreted byFrankia sp. HFPArI3 in defined culture medium were identified with gas chromatography-mass spectrometry (GC-MS). WhenFrankia was grown in the presence of13C(ring-labelled)-L-tryptophan,13C-labelled indole-3-acetic acid (IAA), indole-3-ethanol (IEtOH), indole-3-lactic acid (ILA), and indole-3-methanol (IMeOH) were identified. High performance liquid chromatography (HPLC) and GC-MS with selected ion monitoring were used to quantify levels of IAA and IEtOH inFrankia culture medium. IEtOH was present in greater abundance than IAA in every experiment. When no exogenous trp was supplied, no or only low levels of indole compounds were detected. Seedling roots ofAlnus rubra incubated in axenic conditions in the presence of indole-3-ethanol formed more lateral roots than untreated plants, indicating that IEtOH is utilized by the host plant, with physiological effects that modify patterns of root primordium initiation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02232808
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    Paper (German National Licenses)
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