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Visar resultat 1 - 5 av 234 avhandlingar som matchar ovanstående sökkriterier.

  1. 1. Evolution of Plants : a mathematical perspective

    Författare :Magnus Lindh; Åke Brännström; Jacob Johansson; Mats G Larson; Lennart Persson; Claus Rüffler; Umeå universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Evolution; plants; mathematics; optimization; optimal control; adaptive dynamics; flowering; seasons; tree crown; drought; taproot; trade-off; strategy; trait; ESS; NPP; LAI; Red Queen; Mathematics; matematik;

    Sammanfattning : The Earth harbors around 300 000 plant species. The rich and complex environment provided by plants is considered a key factor for the extraordinary diversity of the terrestrial fauna by, for example, providing food and shelter. LÄS MER

  3. 2. Chemical Communication and Mate Choice : Investigations into the Meaning of a Fruit Fly Pheromone

    Författare :Björn G. Johansson; Göran Arnqvist; Fredrik Widemo; Anders Berglund; Allen Moore; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Ecology; Drosophila grimshawi; sexual selection; pheromone; mate choice; lekking; Ekologi; Terrestrial; freshwater and marine ecology; Terrestisk; limnisk och marin ekologi;

    Sammanfattning : Chemical signals are the most widely used form of sexual communication throughout the living world. However, there is in general little knowledge about what these signals actually communicate. The role of chemical signals, i.e. LÄS MER

  4. 3. Dynamic ultrasound investigation of clubfeet, 0 - 4 years of age, with normal controls

    Författare :Arne G. Johansson; Göteborgs universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; clubfoot; ultrasonography; Ponseti treatment; congenital deformities; range of movement; repeatability; longitudinal study;

    Sammanfattning : Clubfoot is one of the most common congenital deformities, 1-6/1,000 births in Europe and up to 5-6/1,000 in Polynesia. The Ponseti method is now widely regarded as the method of choice for treatment. The treatment starts soon after birth using manipulations and castings until the deformities are corrected, usually 6-10 weeks. LÄS MER

  5. 4. Supplier Involvement in Product Development: A Supplier Perspective

    Författare :Filip Flankegård; Glenn Johansson; Anna Granlund; Peter E. Johansson; Anna Öhrwall Rönnbäck; Mälardalens universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; supplier involvement; supplier integration; supplier collaboration; NPD; manufacturing company; Innovation and Design; innovation och design;

    Sammanfattning : This thesis explores the supplier perspective of supplier involvement in product development. Supplier involvement in product development is crucial for many companies to increase resource flexibility, access competence, reduce costs and time to market, among others. LÄS MER

  7. 5. Duality-based adaptive finite element methods with application to time-dependent problems

    Författare :August Johansson; Mats G. Larson; Paul Houston; Umeå universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; finite element methods; dual-weighted residual method; multiphysics; a posteriori error estimation; adaptive algorithms; discontinuous Galerkin; MATHEMATICS; MATEMATIK; Mathematics; matematik;

    Sammanfattning : To simulate real world problems modeled by differential equations, it is often not sufficient to  consider and tackle a single equation. Rather, complex phenomena are modeled by several partial dierential equations that are coupled to each other. LÄS MER