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Träfflista för sökning "WFRF:(Elliot K) srt2:(2005-2009)"

Sökning: WFRF:(Elliot K) > (2005-2009)

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  • Reid, J M, et al. (författare)
  • Inbreeding effects on immune response in free-living song sparrows (Melospiza melodia)
  • 2007
  • Ingår i: Royal Society of London. Proceedings B. Biological Sciences. - : The Royal Society. - 1471-2954. ; 274:1610, s. 697-706
  • Tidskriftsartikel (refereegranskat)abstract
    • The consequences of inbreeding for host immunity to parasitic infection have broad implications for the evolutionary and dynamical impacts of parasites on populations where inbreeding occurs. To rigorously assess the magnitude and the prevalence of inbreeding effects on immunity, multiple components of host immune response should be related to inbreeding coefficient (f) in free-living individuals. We used a pedigreed, free-living population of song sparrows (Melospiza melodia) to test whether individual responses to widely used experimental immune challenges varied consistently with f. The patagial swelling response to phytohaemagglutinin declined markedly with f in both females and males in both 2002 and 2003, although overall inbreeding depression was greater in males. The primary antibody response to tetanus toxoid declined with f in females but not in males in both 2004 and 2005. Primary antibody responses to diphtheria toxoid were low but tended to decline with f in 2004. Overall inbreeding depression did not solely reflect particularly strong immune responses in outbred offspring of immigrant-native pairings or weak responses in highly inbred individuals. These data indicate substantial and apparently sex-specific inbreeding effects on immune response, implying that inbred hosts may be relatively susceptible to parasitic infection to differing degrees in males and females.
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  • Rustighi, Emiliano, et al. (författare)
  • Linear stochastic evaluation of tyre vibration due to tyre/road excitation
  • 2006
  • Ingår i: EURONOISE 2006 - The 6th European Conference on Noise Control. ; , s. 6P-
  • Konferensbidrag (refereegranskat)abstract
    • Tyre/road interaction is recognised as the main source of interior and exterior noise for velocities over the 40 km/h. In this paper a three-dimensional elemental approach has been adopted to predict the stochastic tyre vibration and hence the interior and exterior noise due to this kind of excitation. The road excitation has been modelled from the spectral density of a common road profile, supposing the road to be an isotropic surface. A linear Winkler bedding connects the 3D model of the tyre with the ground. The exterior noise has been evaluated by an elemental calculation of the radiation matrix of the tyre deformed by the static load on a concrete road. The noise inside the vehicle has also been calculated, using the transfer functions from the force transmitted to the hub and the noise inside the vehicle. Such transfer functions have been computed by a FEM model of a common car body. The simple formulation allows a rapid calculation, but the effects of non-linearities in the contact model are yet to be quantified, and the method requires experimental validation before practical application.
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  • Resultat 1-6 av 6

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