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  • 1
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    Convergence and nonlinear stability of the Lagrange-Galerkin method for the Navier-Stokes equations (1988)
    Springer
    Details
    Publication Date: 1988-07-01
    Print ISSN: 0029-599X
    Electronic ISSN: 0945-3245
    Topics: Mathematics
    Published by Springer
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    PAPER CURRENT
  • 2
    Electronic Resource
    Electronic Resource
    Electronic energy transfer and quenching in copolymers of styrene and 2-(2'-hydroxy-5'-vinylphenyl)-2H-benzotriazole: photochemical processes in polymeric systems. 10 (1986)
    s.l. : American Chemical Society
    Macromolecules 19 (1986), S. 1227-1234 
    Details
    ISSN: 1520-5835
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ma00158a048
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  • 3
    Electronic Resource
    Electronic Resource
    Influence of smoke exposure on soil enzyme activities and nitrification (1988)
    Springer
    Biology and fertility of soils 6 (1988), S. 341-346 
    Details
    ISSN: 1432-0789
    Keywords: Nitrification ; Phosphatase ; Dehydrogenase ; Aerosol ; Soil thickness ; Soil enzymes
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Geosciences , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Soil was exposed to red phosphorous/butyl rubber (RP/BR) aerosols at various relative humidities in a recirculating environmental wind tunnel. Soil microbial and enzymatic activities were measured immediately after exposure and periodically thereafter for 56 days. The nitrification potential was significantly reduced in soil amended with ammonium sulfate and exposed to RP/BR smoke, and could be related to a decline in soil pH. The rate of nitrate formation in unamended soil with time was also reduced, but by 57 days postexposure, concentrations were similat to those of unexposed controls in all but the thinnest soil lense. Soil dehydrogenase and phosphatase enzyme activities were sensitive to RP/BR smoke and in some treatments no activity was detected. The measured activities did not recover within the 56-day postexposure period and in some cases declined. Soil lense thickness was the greatest factor controlling the degree of RP/BR effects, indicating that injury to soil microbial and enzymatic activities may be surficial. Deposition of smoke particles increased with increasing relative humidity, which had a significant impact on the activities measured.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00261024
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  • 4
    Electronic Resource
    Electronic Resource
    Profile of a fused salt near a wall in the GMSA (1987)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 86 (1987), S. 5757-5762 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: The integral equations of the generalized mean spherical approximation (GMSA) are solved for the case of a primitive model fused salt near a wall. In particular, the charge density profile near the wall is determined as a function of the charge on the wall. The input data are the bulk pair correlation functions of the ions determined by the GMSA. The results are presented in graphical form. There are, at the present time, no simulation data or experiments with which to compare the results.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.452503
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  • 5
    Electronic Resource
    Electronic Resource
    Incident-angle bandwidth of surface acoustic wave acousto-optic devices using total internal reflection (1989)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 65 (1989), S. 4366-4371 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: For YZ-LiNbO3 acousto-optic devices that use the side entry and total internal reflection techniques, interaction efficiency is calculated using the Green's function model and the proper expressions for the piezoelectric surface wave and Gaussian beam. This theoretical calculation taking the special interaction geometry into account shows that the incident-angle bandwidth for P-polarized light is about twice as large as that for S-polarized light for YZ-LiNbO3 devices, which agrees with previously reported experimental results.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.343274
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  • 6
    Electronic Resource
    Electronic Resource
    Study of tertiarybutylphosphine pyrolysis using a deuterated source (1989)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 65 (1989), S. 5161-5165 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The pyrolysis of tertiarybutylphosphine (TBP) and the reaction mechanism for the organometallic vapor-phase epitaxial growth of GaP using TBP and trimethylgallium (TMGa) in a He ambient have been studied. A deuterated TBP source (C4H9PD2) was used to label the reaction products and to distinguish possible mechanisms. The reaction was found to be independent of the ambient, and C4H9D was found to be a major product species. However, its relative concentration was determined to increase as the input concentration of the reactant increased. The concentration of C4H9D is even higher when the pyrolysis was catalyzed by GaP surfaces. However, the addition of TMGa retarded both the production of C4H9D and the pyrolysis of TBP. Another species, CH3D, becomes the major deuterated product observed under these conditions. The results lead to the following conclusions: (1) an important reaction for TBP pyrolysis is of second order: the tert-butyl radical (C4H9) attacks TBP; (2) the PH and PH2 species on GaP surfaces, products from the scission of TBP, enhance the pyrolysis of TBP; (3) the same species also attack the adsorbed TMGa, leading to the growth of GaP crystals.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.343169
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  • 7
    Electronic Resource
    Electronic Resource
    Quantum chemical study of adhesion at the SiC/Al interface (1988)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 64 (1988), S. 6246-6253 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Using the intermediate neglect of differential overlap approximation, the total energies of a number of clusters modelled to represent the SiC/Al interface have been calculated as a function of distance separating the two surfaces of SiC and Al. The adhesive energy of the interface is calculated by minimizing the total energies corresponding to various crystallographic orientations of the SiC and Al surfaces. The results are used to provide semiquantitative understanding of the bonding mechanism and the effect of reconstruction at the SiC/Al interface.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.342082
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  • 8
    Electronic Resource
    Electronic Resource
    Synthesis of Bi-Pb-Sr-Ca-Cu oxide/Ag superconductors by melt dipping and oxidation of metallic precursor alloys (1989)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 55 (1989), S. 2227-2229 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Bi-Pb-Sr-Ca-Cu-Ag alloy coatings were made by vacuum induction melting followed by melt dipping on substrates of MgO, SrTiO3, and Al2O3. The metallic precursor layers were then subjected to a controlled atmosphere oxidation and annealing to produce oxide superconductors. Superconducting coatings with onset temperatures of 112 K and zero resistance temperatures of 80 K were obtained in this way. The addition of Ag aided in the alloy melting and dipping processes, and produced a superconducting oxide/noble metal composite after oxidation. The resulting superconducting phases were analyzed by x-ray powder diffraction. The influence of the substrate, dipping processes, oxidation, and annealing conditions on the superconducting properties are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.102353
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  • 9
    Electronic Resource
    Electronic Resource
    Determination of the fixed oxide charge and interface trap densities for buried oxide layers formed by oxygen implantation (1988)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 52 (1988), S. 886-888 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Capacitance-voltage measurements were used to analyze buried oxide layers formed by the implantation of oxygen into silicon substrates. The analysis is based on the extension of conventional metal/oxide/semiconductor capacitor theory to the two buried oxide interfaces of the epilayer/oxide/substrate structure. The processing parameters include oxygen doses of 1.8 or 2.0×1018 cm−2, implant temperature of 500 °C, and anneal temperature of 1250 °C for 2 or 16 h. The results are fixed oxide charge densities of 2–3×1011 and 1–2×1010 cm−2 for the epi/oxide and substrate/oxide interfaces, respectively; interface trap densities are 0.5 to 2×1011 cm−2 eV−1 for the epi/oxide interface, and not measurable for the substrate/oxide interface. The epilayer/oxide interface was found to be more sensitive to processing variations than the substrate/oxide interface.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.99262
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  • 10
    Electronic Resource
    Electronic Resource
    Dielectric relaxation and deuteron NMR of water in polyimide films (1989)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 66 (1989), S. 5290-5296 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Polyimide films containing up to 3.2 wt. % water (H2 O or D2 O) have been studied by dielectric relaxation (DR) and 2H nuclear magnetic resonance (NMR) spectroscopies. Dielectric loss measurements show the presence of a double peak near 200 K due to water, with two components designated as γ1 and γ2 . The γ2 peak, which appears at the lower temperature, is only present for the interior portion of thick (〉25 μm) films and rapidly decreases as the moisture content decreases. Correspondingly, deuteron NMR measurements show the presence of narrow and broad lines, which are correlated, respectively, with the γ1 and γ2 DR peaks. The spin-spin relaxation time T2, is much longer for the narrow line than for the broad line. The γ1 DR peak and the narrow NMR line are attributed to sites where isolated water molecules are only loosely coupled to the polymer chains. The γ2 and broad NMR lines involve small clusters of water molecules with associated nuclear magnetic dipole-dipole coupling. Additional measurements on polyimides containing methanol and acetic acid absorbents are also reported.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.343719
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