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  • 1
    Electronic Resource
    Electronic Resource
    The Hubble constant, supernova light curves and spectra, and radiation transport : The 38th annual meeting of the Division of Plasma Physics (DPP) of the American Physical Society (1997)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Plasmas 4 (1997), S. 2016-2022 
    Details
    ISSN: 1089-7674
    Source: AIP Digital Archive
    Topics: Physics
    Notes: As luminous events that can be physically modeled, supernovae provide an attractive route to the value of the Hubble constant. The modeling involves radiation transport through matter undergoing homologous expansion with velocity gradient on the order of 10−6 s−1. For supernovae of type Ia, which are thermonuclear disruptions of mass accreting or coalescing carbon–oxygen white dwarfs, one wants to be able to calculate the light curve (luminosity in some optical passband versus time), which is powered by the radioactivity decay chain 56Ni→56Co→56Fe. For all kinds of supernovae, including those of types II, Ib, and Ic, which result from the gravitational collapse of the cores of massive stars, the goal is to accurately calculate the emergent ultraviolet–optical–infrared spectra, as a function of time. Local-thermodynamic-equilibrium (LTE) light-curve calculations for type Ia supernovae by Höflich and co-workers, and our spectrum calculations based on a fully relativistic non-LTE radiative transfer code, are described. The associated radiative transport needs are discussed. © 1997 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.872574
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Activation of thick targets by energetic heavy ions and the resultant radiation levels (1995)
    Springer
    Radiation and environmental biophysics 34 (1995), S. 213-216 
    Details
    ISSN: 1432-2099
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Physics
    Notes: Abstract This study completes data collected for thick targets exposed to carbon and oxygen ions accelerated at 86 MeV/u. The radioactivity induced in carbon and tungsten targets bombarded by argon projectiles at 95 MeV/u has been studied in order to assess the relative contributions of the incoming heavy ion and the mass number of the bombarded nuclei to the consequent radiation hazards related to the production of radioactive ion beams. Induced radioactivity measurements are only rarely made under controlled irradiation conditions, in order to derive from the measured activites the dose rates after beam bombardment and a prediction of radiation protection constraints.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01209744
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    On the microdynamics of composite plates (1995)
    Springer
    Archive of applied mechanics 66 (1995), S. 126-133 
    Details
    ISSN: 1432-0681
    Keywords: Key words composite plates ; periodic structure ; refined scaling ; microdynamics correction
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Summary  The subject of the contribution is an investigation of elastic composite plates with a microperiodic structure along the plate’s midsurface. The computational models of the plates are largely based on the homogenization procedures leading to equations with constant coefficients. However, the homogenization theories neglect the microstructure length-scale effect on the plate’s dynamic behaviour. The objective of this research is to formulate and investigate a refined theory of the composite plates under consideration, which would describe the microdynamic plate behaviour caused by the microstructure. The possible applications of the proposed theory are shown by an example.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00786695
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    On the microdynamics of composite plates (1995)
    Springer
    Archive of applied mechanics 66 (1995), S. 126-133 
    Details
    ISSN: 1432-0681
    Keywords: composite plates ; periodic structure ; refined scaling ; microdynamics correction
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Summary The subject of the contribution is an investigation of elastic composite plates with a microperiodic structure along the plate's midsurface. The computational models of the plates are largely based on the homogenization procedures leading to equations with constant coefficients. However, the homogenization theories neglect the microstructure length-scale effect on the plate's dynamic behaviour. The objective of this research is to formulate and investigate a refined theory of the composite plates under consideration, which would describe the microdynamic plate behaviour caused by the microstructure. The possible applications of the proposed theory are shown by an example.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00786695
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
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