ALBERT

All Library Books, journals and Electronic Records Telegrafenberg

X
feed icon rss

Ihre E-Mail wurde erfolgreich gesendet. Bitte prüfen Sie Ihren Maileingang.

Leider ist ein Fehler beim E-Mail-Versand aufgetreten. Bitte versuchen Sie es erneut.

Vorgang fortführen?

Exportieren
  • 1
    Digitale Medien
    Digitale Medien
    On mechanical stresses at cracks in dielectrics with application to dielectric breakdown (1987)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 62 (1987), S. 3116-3122 
    Details
    ISSN: 1089-7550
    Quelle: AIP Digital Archive
    Thema: Physik
    Notizen: The problem of an electric field applied to an isotropic dielectric containing a crack is considered as far as induced distortions and mechanical stresses are concerned. Near-tip distortions occur when the crack contains a conducting fluid or the surfaces are lined by a conducting layer. Previous treatments of the problem failed to distinguish between material and Maxwell stresses and an unphysical singularity in stress, which was divergent in elastic strain energy, was permitted. In this work, the material stress is identified, and a model is developed in which only physically realistic stress singularities are present. These results are obtained by treating the crack as a narrow but open ellipse rather than a slit crack as in previous models. A conventional crack-tip stress intensity factor KI characterizes the near-tip mechanical fields in the results obtained in this paper. The magnitude of KI due to an electrostatic field is deduced for a conducting central through crack in plane strain. The results suggest a model for dielectric breakdown caused by mechanical propagation of flaws. Data for dielectric breakdown and fracture of MgO and Al2O3 correlate in a way that supports this concept.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.339361
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    Artikel (Nationallizenzen)
    Volltext
  • 2
    Digitale Medien
    Digitale Medien
    On the density expansion of the pair distribution function of nonuniform fluids (1988)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 88 (1988), S. 1983-1990 
    Details
    ISSN: 1089-7690
    Quelle: AIP Digital Archive
    Thema: Physik , Chemie und Pharmazie
    Notizen: The density expansion method is used to determine the pair distribution function of a nonuniform fluid in one dimension in which a two-phase interface is induced by an external field. When the fluid is modeled by the lattice gas with nearest-neighbor forces and the external field by the step function that changes sign at the middle of the chain, terms of arbitrary order in the density expansion can be determined exactly. The kernels of the first- and second-order terms are evaluated in closed form and the pair distribution function is evaluated at each order. These results are tested against the exact expression of the pair distribution function of the same model interface, which was recently obtained by the transfer matrix method. It is found, especially for strong intermolecular forces, that the first- and second-order approximations are not only unable to improve the severe disagreement between the zeroth-order approximation and the exact result, but further aggravate this disagreement, suggesting that the density expansion of the pair distribution function is at best asymptotically convergent.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.454072
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    Artikel (Nationallizenzen)
    Volltext
  • 3
    Digitale Medien
    Digitale Medien
    The asymptotic dispersion of particles in N-layer systems: Periodic boundary conditions (1987)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 86 (1987), S. 454-459 
    Details
    ISSN: 1089-7690
    Quelle: AIP Digital Archive
    Thema: Physik , Chemie und Pharmazie
    Notizen: Previous work on dispersion of particles in N-layer systems (generalized Taylor dispersion) for reflecting boundaries is extended to the case of periodic boundary conditions. An explicit expression for the dispersion is presented; this is never greater than the dispersion for the corresponding system with reflecting boundaries. Applications to chromatography with chemical reaction and to anomalous diffusion are made.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.452585
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    Artikel (Nationallizenzen)
    Volltext
  • 4
    Digitale Medien
    Digitale Medien
    Distribution functions of a one-dimensional phase equilibrium with an interface (1987)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 86 (1987), S. 4657-4667 
    Details
    ISSN: 1089-7690
    Quelle: AIP Digital Archive
    Thema: Physik , Chemie und Pharmazie
    Notizen: We calculate the exact expression of the pair distribution function in the interface of the one-dimensional lattice gas, in which the separation of phases is achieved by imposing an external field which changes sign at the middle of the lattice. The exact distribution functions of arbitrary order can then be obtained from an earlier theorem of Percus. The pair distribution function is shown to decay exponentially as a function of interparticle distance, with a decay length equal to the correlation length of the spontaneous density fluctuations in either bulk liquid or gas phases. This exact result enables us to test approximate theories of the pair distribution function of nonuniform fluids. The exact expression of the direct correlation function is obtained from recent studies of Percus, and of Robert and Widom, and it also is used to test approximate theories of the direct correlation function of nonuniform fluids. Extremely severe disagreement is found between exact results and all commonly used approximations based on local thermodynamics à la van der Waals, while excellent, nearly perfect agreement is found for the dynamic capillary wave-like approximation of Kalos, Percus, and Rao.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.452706
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    Artikel (Nationallizenzen)
    Volltext
  • 5
    Digitale Medien
    Digitale Medien
    Reply to the "Comment on silane pyrolysis and the insertion of silylene into molecular hydrogen'' (1987)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 86 (1987), S. 3059-3060 
    Details
    ISSN: 1089-7690
    Quelle: AIP Digital Archive
    Thema: Physik , Chemie und Pharmazie
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.452016
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    Artikel (Nationallizenzen)
    Volltext
  • 6
    Digitale Medien
    Digitale Medien
    Use of the discrete variable representation in the infinite order sudden approximation for reactive scattering (1987)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 86 (1987), S. 2007-2019 
    Details
    ISSN: 1089-7690
    Quelle: AIP Digital Archive
    Thema: Physik , Chemie und Pharmazie
    Notizen: An infinite order sudden approximation (IOSA) for reactive scattering is derived using the discrete variable representation (DVR). The formal properties of this formulation are examined, and possible formal constraints on the IOS parameters are discussed. The DVR-IOSA is used to calculate reaction probabilities for J=0 H+H2 on the Porter–Karplus surface at energies below 1.1 eV, and the results are compared with more accurate calculations. A model problem where the sudden approximation is known to work well (model H+H2 reacting out of the v=1 state) is also studied within the DVR-IOSA context. These results are used to examine more generally the accuracy of the IOSA for reaction scattering calculations.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.452151
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    Artikel (Nationallizenzen)
    Volltext
  • 7
    Digitale Medien
    Digitale Medien
    Equilibrium structure of liquid wetting layers (1987)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 86 (1987), S. 1521-1532 
    Details
    ISSN: 1089-7690
    Quelle: AIP Digital Archive
    Thema: Physik , Chemie und Pharmazie
    Notizen: A phenomenological theory of the liquid wetting layer is presented. Its predictions are compared to those of earlier simpler models as well as to recent experimental results. Special attention is given to the critical region and to the crossover from the complete wetting regime to the critical wetting regime.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.452189
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    Artikel (Nationallizenzen)
    Volltext
  • 8
    Digitale Medien
    Digitale Medien
    On the validity of Smoluchowski's equation for cluster–cluster aggregation kinetics (1985)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 82 (1985), S. 5269-5274 
    Details
    ISSN: 1089-7690
    Quelle: AIP Digital Archive
    Thema: Physik , Chemie und Pharmazie
    Notizen: Large-scale computer simulations of cluster–cluster aggregation of particles undergoing Brownian motion have been performed to investigate the kinetic properties of the coagulation process. It is shown that the mean-field approach of the Smoluchowski equation accurately describes the kinetics if the fractal geometry of the clusters is taken into account. The kinetic rate kernels that enter into that equation are deduced explicitly from the simulations.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.448600
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    Artikel (Nationallizenzen)
    Volltext
  • 9
    Digitale Medien
    Digitale Medien
    On the universality of the bridge function in simple classical fluids (1986)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 85 (1986), S. 6068-6071 
    Details
    ISSN: 1089-7690
    Quelle: AIP Digital Archive
    Thema: Physik , Chemie und Pharmazie
    Notizen: The bridge function of the one-dimensional lattice gas with interactions between nearest-neighbor and next-nearest-neighbor particles is determined exactly. This result is compared with the recently proposed hypothesis of universality of the bridge function of simple classical fluids. It is found that in contrast to three-dimensional systems previously studied, the bridge function of the one-dimensional lattice gas is a strongly nonmonotonic function of the interparticle distance, being negative at very short distances and vanishing positively at infinity. Consequently, the one-parameter family of positive and monotonic bridge functions of the hard-sphere (rod) system, recently suggested to be universal, cannot be used for the one-dimensional lattice gas. Dedicated to Thomas Leland.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.451523
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    Artikel (Nationallizenzen)
    Volltext
  • 10
    Digitale Medien
    Digitale Medien
    [3+2] resonance enhanced multiphoton ionization of I and Br formed from the infrared multiphoton decomposition of CF3I and CF3Br (1988)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 89 (1988), S. 2925-2931 
    Details
    ISSN: 1089-7690
    Quelle: AIP Digital Archive
    Thema: Physik , Chemie und Pharmazie
    Notizen: Resonance enhanced multiphoton ionization (REMPI) has been used to study the products of the infrared multiphoton decomposition (IRMPD) of CF3I in a very low-pressure photolysis (VLPΦ) cell. The strongest REMPI signals are due to the ground state I(2P3/2) and the spin–orbit excited state I*(2P1/2). The origins of I and I* were determined from the time and IR laser fluence dependences of the REMPI signal. I* is formed by visible single photon dissociation of vibrationally excited CF3I and by visible multiphoton dissociation of I2 and thermal CF3I. The ionization efficiency of I has been determined relative to NH3 for our probe laser conditions, and the sticking coefficient of I with gold surfaces has been determined. The REMPI spectra of the products of the IRMPD of CF3Br is also presented.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.454997
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    Artikel (Nationallizenzen)
    Volltext
Schließen ⊗
Diese Webseite nutzt Cookies und das Analyse-Tool Matomo. Weitere Informationen finden Sie hier...