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  • 1
    Electronic Resource
    Electronic Resource
    Proton NMR spectra without spin-spin splittings (1991)
    s.l. : American Chemical Society
    Journal of the American Chemical Society 113 (1991), S. 3596-3597 
    Details
    ISSN: 1520-5126
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ja00009a059
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  • 2
    Electronic Resource
    Electronic Resource
    Direct evidence for spillover of hydrogen from ruthenium to copper in supported copper-ruthenium/silica catalysts: a study by NMR of chemisorbed hydrogen (1986)
    s.l. : American Chemical Society
    Journal of the American Chemical Society 108 (1986), S. 6056-6058 
    Details
    ISSN: 1520-5126
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ja00279a073
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  • 3
    Electronic Resource
    Electronic Resource
    A generalized Adadorov theory for anisotropic thin-walled beams (1992)
    Springer
    Acta mechanica solida Sinica 5 (1992), S. 361-380 
    Details
    ISSN: 0894-9166
    Keywords: anisotropic thin—walled beam ; generalized Adadorov theory ; middle surface shear strain
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract This paper presents a generalized Adadorov theory for anisotropic thin—walled beams. The theory takes account of the shear strain of the middle surface, which exerts a significant influence on the anisotropic thin-walled beams. A new approach is established to solve the governing equations, which have the same form for both open and closed section beams. The numerical examples show that the effects of the shear strain cannot be neglected for this class of beams.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02208395
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  • 4
    Electronic Resource
    Electronic Resource
    Molecular dynamic study of grain boundary embrittlement for [101] tilt copper bicrystals induced by bismuth segregation (1992)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 71 (1992), S. 1229-1236 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The selective bismuth segregation and the microprocess of fracture for the three [101] tilt copper bicrystals Σ9(2¯1¯2) 38.94°, Σ11(3¯2¯3) 50.48°, and Σ33(5¯4¯5) 58.99° have been studied by a molecular dynamics technique. The results show that the Bi segregation and the fracture behavior of the Cu-Bi bicrystals are strongly dependent on the grain boundary (GB) structure. The Bi segregation is strongly related to the polyhedra constructing the GB cores and the stress fields of the GB dislocations (GBDs), and the GB embrittlement of copper induced by the Bi segregation is determined by the segregated concentration and the distribution of Bi atoms. With the increase of the relative number of pentagonal bipyramids and the localization of the stress fields of the GBDs in the GBs, the bicrystals Σ9, Σ11, and Σ33 show a decreasing propensity for the Bi segregation and subsequent different fracture behaviors. The severe intergranular brittle fracture that happens in the Σ9 bicrystal is mainly caused by the breaking of weakened Cu-Cu bonds, which is related to the highly concentrated Bi segregation at the GB core. In the case of the Σ11 bicrystal, the segregation of Bi atoms at the GB shows an inhomogeneous distribution characteristic, so that the fracture is intergranular but with a large amount of shear deformation. The transgranular fraction that appears in the Σ33 bicrystal is related to the low concentration of the Bi segregation and the dispersive distribution of the Bi atoms along the GB and in the grains.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.351293
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  • 5
    Electronic Resource
    Electronic Resource
    Molecular dynamics study of deformation and fracture for pure and bismuth-segregated tilt copper bicrystals (1990)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 68 (1990), S. 548-555 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The microprocess of deformation and fracture for pure and Bi-segregated Σ3(1¯1¯1)/[101] 70.53° and Σ33(5¯4¯5)/[101] 58.99° tilt bicrystals of metal copper has been studied by the molecular dynamics method. It has been found that deformation and fracture are dependent on the grain boundary (GB) structure and bismuth segregation. For pure Σ33 bicrystal, the deformation is mainly due to the glide of partial dislocations generated from the GB structural units where the GB dislocations exist. The ductile fracture is attributed to the dislocation emission, which leads to vacancy generation and void coalescence. The bismuth segregation weakens the atomic bonds between copper atoms in the vicinity of GB. Under the action of the external load, the weakened bonds break and lead to formation of microcracks. Finally, the brittle fracture takes place along the binding weakening region. For Σ3 bicrystal, the ductile fracture is related to the void coalescence generated not by dislocation emission but by lattice distortion, and the brittle fracture induced by bismuth segregation is also caused by the breaking of weakened Cu—Cu bonds.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.346827
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  • 6
    Electronic Resource
    Electronic Resource
    A pulse for all seasons. Fourier transform spectra without a phase gradient
    Amsterdam : Elsevier
    Journal of Magnetic Resonance (1969) 79 (1988), S. 561-567 
    Details
    ISSN: 0022-2364
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1016/0022-2364(88)90092-3
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  • 7
    Electronic Resource
    Electronic Resource
    Transition temperature control of liquid crystalline poly(heptene sulphone)s (1997)
    Springer
    Polymer bulletin 39 (1997), S. 179-184 
    Details
    ISSN: 1436-2449
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract. Liquid crystalline poly(heptene sulphone)s containing cholesteryl undecylenic ester and cholestanyl undecylenic ester were synthesized. The polymers displayed cholesteric mesophases during thermal transition. The clearing temperatures were from 114 to 172 °C depending on the molar ratio of mesogenic esters in the polymers.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002890050136
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  • 8
    Electronic Resource
    Electronic Resource
    Classically dynamical behaviour of a nucleon in heavy nuclei (1998)
    Springer
    The European physical journal 2 (1998), S. 115-121 
    Details
    ISSN: 1434-601X
    Keywords: PACS:05.45.+b Theory and models of chaotic systems – 21.60.Cs Shell model – 03.20.+i Classical mechanics of discreta systems: general mathematical aspects – 11.10.Lm Nonlinear or nonlocal theories and models
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract: Within the framework of the two-center shell model the classically dynamical behaviour of a nucleon in heavy nuclei is investigated systematically with the change of nuclear shape parameters for the first time. It is found that as long as the nucleonic energy is appreciably higher than the height of the potential barrier there is a good quantum-classical correspondence of nucleonic regular (chaotic) motion. Thus, Bohigas, Giannoni and Schmit conjecture is confirmed once again. We find that the difference between the potential barrier for prolate nuclei and that for oblate ones is reponsible for the energy-dependence difference between the nucleonic chaotic dynamics for prolate nuclei and that for oblate ones. In addition, it is suggested that nuclear dissipation is shape-dependent, and strong nuclear dissipation can be expected for medium or large separations in the presence of a considerable neck deformation built on a pronounced octupole-like deformation, which provides us a dynamical understanding of nuclear shape dependence of nuclear dissipation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s100500050099
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  • 9
    Electronic Resource
    Electronic Resource
    Dynamical origin of the quantum chaotic motion of a single particle in the two-center shell model (1998)
    Springer
    The European physical journal 3 (1998), S. 217-223 
    Details
    ISSN: 1434-601X
    Keywords: PACS: 05.45.+b Theory and models of chaotic systems – 21.60.Cs Shell model – 03.20.+i Classical mechanics of discrete systems: general mathematical aspects – 11.10.Lm Nonlinear or nonlocal theories and models – 11.30.Na Nonlinear and dynamical symmetries
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract: For the single-particle potential surface of the two-center shell model, two geometrical quantities which determine the local Liapunov exponents are derived. It is shown that the appearance of a large positive local Liapunov exponent in a large area of the coordinate space leads to the quantum chaotic motion of a single particle in heavy nuclei. For both small and large (or medium) separations of the two centers, the dependence of the quantum chaotic motion on the neck deformation is interpreted from the dynamical point of view.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s100500050171
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  • 10
    Electronic Resource
    Electronic Resource
    Temperature dependence of deformation and fracture for a low alloy Mn-steel (1990)
    Springer
    International journal of fracture 42 (1990), S. R49 
    Details
    ISSN: 1573-2673
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00013221
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