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  • Bone permittivity  (2)
  • PACS: 42.55.Wd; 42.25.Ja; 42.55.Ah  (2)
  • 1
    Electronic Resource
    Electronic Resource
    General model for a multimode Nd-doped fiber laser. II: Steady-state analysis of length-dependent polarization effects (2000)
    Springer
    Applied physics 70 (2000), S. 33-43 
    Details
    ISSN: 1432-0649
    Keywords: PACS: 42.55.Wd; 42.25.Ja; 42.55.Ah
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract. We present a steady-state analysis of a general model for a bipolarized Nd-doped fiber laser including the slow longitudinal variations of the dynamical variables. The combined effects of pump-induced, distributed, and localized anisotropies are studied versus the fiber length. In particular, the evolution of the thresholds versus the pump-input polarization angle, for different fiber lengths, is investigated in depth. Approximate analytical results are derived for the thresholds and the output intensities. A good agreement with the numerical simulations is achieved in a large range of parameters.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s003400050005
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    General model for a multimode Nd-doped fiber laser. I: Construction of the model (2000)
    Springer
    Applied physics 70 (2000), S. 23-31 
    Details
    ISSN: 1432-0649
    Keywords: PACS: 42.55.Wd; 42.25.Ja; 42.55.Ah
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract. We present a general modeling of a multi-longi-tudinal-mode bipolarized Nd-doped fiber laser which keeps both vectorial (polarization) and longitudinal properties in the dynamical equations. We use an approach based on random orientation of the microscopic dipoles and demonstrate that it is isomorphic to the model derived assuming a transverse two-site distribution function for the ions. This result is also true under the mean-field approximation. At steady-state, the model is the generalization of Rigrod’s theory to the case of a bipolarized laser.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s003400050004
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Variation of the electric properties along the diaphysis of bovine femoral bone (1991)
    Springer
    Medical & biological engineering & computing 29 (1991), S. 441-446 
    Details
    ISSN: 1741-0444
    Keywords: Bone conductivity ; Bone impedance ; Bone permittivity ; Cortical bone ; Femoral diaphysis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Medicine
    Notes: Abstract A preliminary study is presented of the variability of the electric properties, in the axial, tangential and radial directions, as a function of position in the diaphysis of a femoral bovine bone. The measurements were carried out at three frequencies: 100 Hz, 10 kHz and 1 MHz. It is shown that both the conductivity and the permittivity exhibit significant variations along the diaphysis, and increase in magnitude towards the epiphyses. From this study, the variation of the electric properties cannot be clearly and directly ascribed to the longitudinal variability of the total volumetric fluid content of the bone. The results reflect the orthotropic nature of the electric properties, at any given location, and indicate a position-dependent tendency towards axis symmetry.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02441667
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Dielectric properties of fluid-saturated bone: a comparison between diaphysis and epiphysis (1988)
    Springer
    Medical & biological engineering & computing 26 (1988), S. 313-316 
    Details
    ISSN: 1741-0444
    Keywords: Bone conductivity ; Bone impedance ; Bone permittivity ; Diaphysis ; Epiphysis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02447087
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    Paper (German National Licenses)
    Fulltext
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