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  • 1
    Electronic Resource
    Electronic Resource
    Microscopic simulation of a chemical instability (1992)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 96 (1992), S. 2000-2004 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: We present a direct simulation of a reacting dilute mixture, for which the corresponding rate equations for the concentrations display a limit cycle behavior when the system is forced out of equilibrium by an external mass current. The time dependent concentrations computed in the simulation compare well with the solutions of the macroscopic rate equations. We also find agreement between the microscopic simulations results and a Langevin description for what concerns the concentration fluctuations in the system below and beyond the bifurcation point.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.462102
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  • 2
    Electronic Resource
    Electronic Resource
    Computer modeling of a liquid–liquid interface (1988)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 89 (1988), S. 1067-1073 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: Molecular dynamics method and Lennard-Jones potential functions are employed to model liquid–liquid interfaces. The simulations are carried out in a range of temperature and pressure near the triple point. The investigated systems are symmetric and composed of two identical liquids L1 and L2. The interactions between the atoms of L1 and L2 are obtained from modified Lennard-Jones potential functions where extra parameters are introduced to reduce the miscibility between the two liquids. The interfacial tensions and the miscibilities are varied by using different parameters. The interfaces thus obtained are stable on the time scale of the simulation as shown by the density and pressure profiles. This is also confirmed by a geometrical analysis performed in order to characterize the fluctuations of the interfaces. The calculation of the diffusion coefficients shows clearly an anisotropy of the diffusion process in the interfacial region.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.455259
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  • 3
    Electronic Resource
    Electronic Resource
    Kinetics of adsorption of an amphiphilic molecule near a liquid-liquid interface (1991)
    s.l. : American Chemical Society
    The @journal of physical chemistry 〈Washington, DC〉 95 (1991), S. 10723-10729 
    Details
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/j100179a039
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  • 4
    Electronic Resource
    Electronic Resource
    The local pressure in a cylindrical liquid–vapor interface: A simulation study (1997)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 106 (1997), S. 645-654 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: The equilibrium force distribution, or the local pressure in an interface as defined in a companion paper, has been determined from molecular dynamics simulations of a Lennard-Jones fluid. Both a cylindrical and a planar interface are considered. Limited evidence is found that the surface tension could be independent of the curvature of the interface. © 1997 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.473402
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  • 5
    Electronic Resource
    Electronic Resource
    A simple technique for analysing and partly removing galvanic distortion from the magnetotelluric impedance tensor: application to Abitibi and Kapuskasing data (Canada) (1992)
    Oxford, UK : Blackwell Publishing Ltd
    Geophysical journal international 108 (1992), S. 0 
    Details
    ISSN: 1365-246X
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences
    Notes: Galvanic distortion of the regional electrical field by surficial local heterogeneities disturbs the regional inductive response. We present a simple method for (a) detecting the presence of galvanic distortion in the measured impedance tensor, (b) defining the regional dimensionality of the background (1-D or 2-D; 3-D is excluded from the analysis) and (c) recognizing whether or not measurements were taken in the true regional axes (if the regional tensor is 2-D). In the case of distortion of a 1-D regional tensor, a tensor decomposition does not bring more information than that given by the effective impedance (Berdichevsky & Dmitriev 1976). In the case of a 2-D regional tensor, if the measurement axes do not coincide with the regional principal axes, both apparent resistivities and phases will be affected. Whether or not measurement and principal axes coincide will define the form of distortion model to use in the removal technique. A simple inversion method is used for this purpose. The approach, which is a cross between that presented by Bahr (1988) and Groom & Bailey (1989) and does not remove static shift, is tested on synthetic and real data. The results of the application to real data suggest that this type of analysis should be carried out prior to any interpretation of magnetotelluric data collected in regions of complex geology.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-246X.1992.tb03480.x
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  • 6
    Electronic Resource
    Electronic Resource
    A magnetotelluric survey on Manitoulin Island and Bruce Peninsula along GLIMPCE seismic line J: black shales mask the Grenville Front (1991)
    Oxford, UK : Blackwell Publishing Ltd
    Geophysical journal international 105 (1991), S. 0 
    Details
    ISSN: 1365-246X
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences
    Notes: The results of a magnetotelluric survey extending southeast from Manitoulin Island to Bruce Peninsula across the Grenville Front Tectonic Zone are presented. A cover of Phanerozoic sediments, including a highly conductive layer of black shales of limited extent, precludes the exact definition of electrical features at depth; thus a comparison with the seismic reflections observed on GLIMPCE line J is impossible. However, the interpretation of the electromagnetic data proves to be an excellent illustration of electrical distortion and attenuation in 3-D environments. We show in particular that features originally interpreted as due to a thin conductor at mid-crustal depth are actually representative of edge effects related to the sedimentary cover. A schematic 2-D model of the region along selected profiles including the Phanerozoic sediments also helps to reconciliate electromagnetic observations at East Bull Lake (Krutz, Ostrowski & Niblett 1986) with those of the present survey.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-246X.1991.tb03453.x
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  • 7
    Electronic Resource
    Electronic Resource
    A model of lower crustal electrical anisotropy for the Pontiac Subprovince of the Canadian Shield (1992)
    Oxford, UK : Blackwell Publishing Ltd
    Geophysical journal international 111 (1992), S. 0 
    Details
    ISSN: 1365-246X
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences
    Notes: Magnetotelluric data from the Pontiac Subprovince of the Canadian Shield indicate that the crustal electrical conductivity structure of the region is very uniform. Because the data are distorted by near-surface electrical heterogeneities, the exact parameters of the resistivity structure may vary for different static shift corrections but the same sequence of layers is retained. An approximate one-dimensional model of the Pontiac, based on inversion of the effective impedance recorded at each site, consists of a thin conductive weathered layer, underlain by at least 12 km of resistive upper crust at 5000 Ωm or more. A mid-crustal layer of 200 Ωm extends to a depth of 25 km or more, below which there is evidence of an increase in the bulk resistivity in the lower crust and/or upper mantle. However, this last layer displays marked non-one-dimensional magnetotelluric responses which appear to be quite uniform along the profile. Similar responses have been seen in other parts of the Canadian Shield and the Baltic Shield. This feature in the MT data can be explained by azimuthal electrical anisotropy or by a two-dimensional conductive structure. The absence of any large vertical magnetic field responses suggests that anisotropy is the more likely cause. Modelling the anisotropy shows that a ratio of horizontal resistivities between 1:6 and 1:13 is representative of the lower crust and/or the upper mantle in the area. The higher conductivity is found for electric fields measured in the east-west direction subparallel to the tectonic fabric of the shield in this region.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-246X.1992.tb00560.x
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  • 8
    Electronic Resource
    Electronic Resource
    Archaean cratonic roots, mantle shear zones and deep electrical anisotropy (1995)
    [s.l.] : Nature Publishing Group
    Nature 375 (1995), S. 134-137 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Magnetotellurics, a deep-sounding electromagnetic technique based on measurements of natural electric and magnetic fields at the surface of the Earth, is well suited to probing the electrical response of the lithosphere. Because the upper crust of the Canadian shield is very resistive3 ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/375134a0
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  • 9
    Electronic Resource
    Electronic Resource
    On the use of K indices to define maximum external contributions to Magsat data at mid-latitudes
    Amsterdam : Elsevier
    Physics of the Earth and Planetary Interiors 43 (1986), S. 199-204 
    Details
    ISSN: 0031-9201
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Geosciences , Physics
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0031-9201(86)90047-6
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  • 10
    Electronic Resource
    Electronic Resource
    Magnetotelluric observations over the Rhine Graben, France: a simple impedance tensor analysis helps constrain the dominant electrical features
    Amsterdam : Elsevier
    Physics of the Earth and Planetary Interiors 74 (1992), S. 191-197 
    Details
    ISSN: 0031-9201
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Geosciences , Physics
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0031-9201(92)90009-K
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