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  • Springer  (149)
  • Cambridge University Press  (17)
  • 2005-2009
  • 2000-2004  (34)
  • 1995-1999  (132)
  • 1980-1984
  • 2004  (34)
  • 1995  (132)
  • 1
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    Establishment success of conservation tree plantations in relation to silvicultural practices in Indiana, USA (2004)
    Springer
    Details
    Publication Date: 2004-07-01
    Print ISSN: 0169-4286
    Electronic ISSN: 1573-5095
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Published by Springer
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    PAPER CURRENT
  • 2
    Electronic Resource
    Electronic Resource
    Kepler translated (1995)
    Cambridge : Cambridge University Press
    The @British journal for the history of science 28 (1995), S. 345-349 
    Details
    ISSN: 0007-0874
    Source: Cambridge Journals Digital Archives
    Topics: History , Natural Sciences in General
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1017/S0007087400033203
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Polarization dynamics of a dual-frequency laser with a nearly isotropic resonator in the presence of anisotropic feedback (1995)
    Springer
    Optical and quantum electronics 27 (1995), S. 495-502 
    Details
    ISSN: 1572-817X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology , Physics
    Notes: Abstract The polarization dynamics of a dual-frequency, nearly isotropic He-Ne laser in the presence of weak anisotropic feedback were studied. Depending on the location of the perturbed mode under the gain curve, three distinctive hysteresis characteristics were observed. These hysteresis characteristics are distinguished by the height and width of the corresponding hysterograms. These switching dynamics are explained qualitatively in terms of the stability analysis of Lamb's multimode laser theory.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00563589
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  • 4
    Electronic Resource
    Electronic Resource
    Platinum-group metal cyclodextrin complexes and their use as command-cure catalysts in silicones (1995)
    Springer
    Journal of inorganic and organometallic polymers and materials 5 (1995), S. 377-390 
    Details
    ISSN: 1572-8870
    Keywords: Hydrosilylation ; cyclodextrin ; platinum catalyst ; silicone
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The Command-Cure concept is defined for a curable formulation as one with long work-like at ambient temperature and rapid cure time at elevated temperature. This concept is explored for a curable silicone system, cured via hydrosilylation. CODMCl2 complexes (COD=1.5-cyclo-octadiene:M=Pt. Pd) are reacted with beta-cyclodextrin (β-CD) to make 1∶1 inclusion compounds,M=Pd.2;M=Pt.4. Compounds2 and4 were analyzed by1H NMR and X-ray powder diffraction. Their catalytic ability was evaluated in a model system as well as a polymeric system that gels upon cure. Surprisingly, the Pd analog2 was a good command-cure catalyst whereas the guest compound CODPdCl2,1, was not active in the hydrosilylation reaction. The Pt analog,4, was an effective command-cure catalyst while the corresponding guest. CODPtCl2,3, was too active at low temperature in the hydrosilylation reaction. Additional Pt compounds and one Rh inclusion compound were evaluated as command cure catalysts. These inclusion compounds were: 1∶1 β-CD:[CODRhCl]2,5: 1∶1 β-CD:CpPtMe3,6 (Cp=cyclopentadienyl): 1∶2 β-CD:MeCpPtMe3,7; 1∶2 β-CO:CODPtMe2,8. The effectiveness of4 8 was evaluated in a number of silicone systems.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01193061
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  • 5
    Electronic Resource
    Electronic Resource
    X-ray absorption spectroscopy of Ti-containing molecular sieves ETS-10, aluminum-free Ti-β, and TS-1 (1995)
    Springer
    Catalysis letters 34 (1995), S. 101-113 
    Details
    ISSN: 1572-879X
    Keywords: ETS-10 ; TS-1 ; Ti-β ; EXAFS ; XANES ; X-ray ; UV ; methanol ; 2-propanol
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract We report here the first structural characterization by Ti K-edge EXAFS and XANES of ETS-10 and aluminum-free Ti-β molecular sieves. A TS-1 sample was also studied for comparison. The near-edge spectrum of TS-1 revealed an intense pre-edge feature characteristic of Ti atoms in tetrahedral coordination. However, the pre-edge peak for ETS-10 was quite small and shifted in energy, which is consistent with the known octahedral structure surrounding Ti atoms in the material. Analysis of the EXAFS for ETS-10 revealed an average Ti-O interatomic distance of 2.00 +- 0.01 Å which is longer than the Ti-O distance (1.95Å) in anatase TiO2. For Ti-β, an intense pre-edge peak is present in the near-edge spectrum and the intensity, energy and width of this peak are the same as for TS-1. In addition, the average Ti-O interatomic distance in Ti-β and TS-1 was 1.80 +- 0.01 Å, which is significantly shorter than the distance measured in ETS-10. The EXAFS and XANES results indicate that the Ti sites in aluminum-free Ti-β are structurally identical to the tetrahedral sites in TS-1. This conclusion is supported by the similarity of the UV absorption thresholds for the two samples. X-ray absorption spectra were also recorded with methanol or 2-propanol adsorbed on the Ti-β and TS-1 molecular sieves. Alcohol adsorption decreased the intensity and broadened the Ti pre-edge peak for both samples, demonstrating a local chemical interaction with the Ti sites. Methanol adsorption lengthened the average Ti-O bond to 1.83 ± 0.01 Å. The similarity of the X-ray absorption spectra for aluminum-free Ti-β and TS-1 in the presence of alcohols suggests that the Ti sites in the two frameworks are chemically indistinguishable for vapor-phase adsorption of alcohols at low concentrations.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00808327
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  • 6
    Electronic Resource
    Electronic Resource
    An elementary proof of the local central limit theorem (1995)
    Springer
    Journal of theoretical probability 8 (1995), S. 693-701 
    Details
    ISSN: 1572-9230
    Keywords: Central limit theorem
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Notes: Abstract We give an elementary proof of the local central limit theorem for independent, non-identically distributed, integer valued and vector valued random variables.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02218051
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  • 7
    Electronic Resource
    Electronic Resource
    Analysis of an experiment aimed at improving the reliability of transmission centre shafts (1995)
    Springer
    Lifetime data analysis 1 (1995), S. 275-306 
    Details
    ISSN: 1572-9249
    Keywords: Orthogonal arrays ; orthogonal contrasts ; censoring ; half-normal plots ; Taguchi ; proportional hazards ; Weibull regression
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Notes: Abstract Smith (1991) presents a paper proposing the use of Weibull regression models to establish dependence of failure data (usually times) on covariates related to the design of the test specimens and test procedures. In his article Smith made the point that good experimental design was as important in reliability applications as elsewhere, and in view of the current interest in design inspired by Taguchi and others, we pay some attention in this article to that topic. A real case study from the Ford Motor Company is presented. Our main approach is to utilize suggestions in the literature for applying standard least squares techniques of experimental analysis even when there is likely to be nonnormal error, and censoring. This approach lacks theoretical justification, but its appeal is its simplicity and flexibility. For completeness we also include some analysis based on the proportional hazards model, and in an attempt to link back to Smith (1991), look at a Weibull regression model.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00985761
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  • 8
    Electronic Resource
    Electronic Resource
    Mössbauer spectroscopy study of iron-based catalysts used in Fischer-Tropsch synthesis (1995)
    Springer
    Topics in catalysis 2 (1995), S. 71-78 
    Details
    ISSN: 1572-9028
    Keywords: Mössbauer spectroscopy ; Fischer-Tropsch synthesis ; iron-based catalysts ; χ-carbide ; magnetite ; water-gas shift activity ; pretreatment
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Mössbauer spectroscopy investigation of iron-based Fischer-Tropsch (FT) catalysts from the US Department of Energy's LaPorte pilot plant demonstration run (August 1992) has revealed that the ratio of iron in the octahedral site to that in the tetrahedral site in magnetite correlates with the water-gas-shift activity. Studies of the catalysts from laboratory-scale fixed-bed reactor indicate that activation of the oxide precursor with CO results in the formation of χ-carbide (Fe5C2) whose amount decreases with increasing SiO2 content in the catalyst. The Fe5C2 is converted into Fe3O4 during FT synthesis. The FT activity of the catalyst is found to follow the trend of χ-carbide variation indicating that χ-carbide is active for the FT synthesis.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01491956
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  • 9
    Electronic Resource
    Electronic Resource
    Fischer-Tropsch synthesis: Impact of potassium and zirconium promoters on the activity and structure of an ultrafine iron oxide catalyst (1995)
    Springer
    Topics in catalysis 2 (1995), S. 1-15 
    Details
    ISSN: 1572-9028
    Keywords: Fischer-Tropscb synthesis ; ultrafine iron oxide catalyst ; Mössbauer ; XRD ; BET ; pretreatment ; promoters ; iron carbides
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Slurry phase Fischer-Tropsch synthesis was conducted with an ultrafine iron oxide catalyst promoted with either 0.5 at% K or 1.0 at% Zr or both. Pretreatment in CO yielded higher conversions and a more stable catalyst than activation in hydrogen or synthesis gas. Hydrogen pretreatment of K promoted catalysts and synthesis gas activation in general were less effective. Mössbauer spectroscopy and XRD showedχ-Fe5C2 and ε′-Fe2.2C were formed during pretreatment in CO and did not depend on promoters present. Catalysts pretreated in H2 were reduced to metallic Fe and Fe3O4; promotion with K and Zr decreased the extent of reduction. Hydrogen pretreated catalysts, promoted with K, lost surface area and carbided rapidly under synthesis conditions. Activation in synthesis gas reduced all catalysts to Fe3O4. Subsequent synthesis did not affect the phase present for the unpromoted and Zr promoted catalysts while those promoted with K formed χ-Fe5C2 and ε′-Fe2.2C. It is concluded that pretreatment type is more important to the catalyst activity during the early period of synthesis than the impact of promotion with K and/or Zr and that changes in the bulk composition of iron catalysts do not necessarily correlate with changes in activity.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01491951
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  • 10
    Electronic Resource
    Electronic Resource
    Prediction of adsorption of xenon in zeolite NaA with molecular density functional theory (1995)
    Springer
    The European physical journal 97 (1995), S. 353-360 
    Details
    ISSN: 1434-6036
    Keywords: 68.45.By ; 05.20.-y
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The Tarazona model of molecular density functional theory is used to determine the adsorption isotherm and the density distribution of xenon atoms in zeolite NaA. We consider the alpha cage of NaA to be fully three-dimensional and we introduce a basis set for the density distribution to make the solution computationally tractable. The results of this density functional theory model are compared to previous results of grand canonical Monte Carlo simulations for the same system.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01307488
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