Sökning: "Ödeen"

Hittade 3 avhandlingar innehållade ordet Ödeen.

  1. 1. Effects of Post-Glacial Range Expansions and Population Bottlenecks on Species Richness

    Författare :Anders Ödeen; Godfrey Hewitt; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Developmental biology; Peripatric speciation; bottlenecks; mating asymmetries; Kaneshiro model; Quaternary ice-ages; phylogeny; Motacilla; Motacilla flava; Utvecklingsbiologi; Developmental biology; Utvecklingsbiologi; Animal Ecology; zooekologi;

    Sammanfattning : This thesis relates modern speciation theory to the effects of sudden changes in the range and size of populations. Special reference is made to the climatic oscillations during the Quaternary ice ages. LÄS MER

  3. 2. Determination of viscoelastic material properties and impact force from measurements on impacted bodies

    Författare :Sven Ödeen; Luleå tekniska universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Hållfasthetslära; Solid Mechanics;

    Sammanfattning : Methods are presented for identification of linear and nonlinear viscoelastic materials and for prediction of impact force on the basis of measurements made on impacted bodies. The complex modulus is identified from measured end-point accelerations of an impacted rod specimen, and in-situ from measured strains at three sections of a rod-like member of an impacted structure. LÄS MER

  4. 3. Two problems of viscoelastic impact : prediction of impact force and identification of complex modulus

    Författare :Sven Ödeen; Luleå tekniska universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Hållfasthetslära; Solid Mechanics;

    Sammanfattning : .... LÄS MER