Search for dissertations about: "cluster dynamics"

Showing result 16 - 20 of 99 swedish dissertations containing the words cluster dynamics.

  2. 16. Drivers of polymorphism dynamics in pygmy grasshoppers

    Author : Jenny Johansson; Anders Forsman; Jacob Höglund; Linnéuniversitetet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Evolutionary Biology; Evolutionsbiologi;

    Abstract : In this thesis, I used colour polymorphism in pygmy grasshoppers as a model system to study the influence of selection, developmental plasticity, mating behaviour and gene flow on patterns of phenotypic and genetic diversity within and among populations in changing environments.Data for more than 5,000 individuals collected from natural populations showed that the incidence of black (melanic) pygmy grasshoppers was higher in burnt than in non-burnt areas, and rapidly declined over time within populations in post-fire environments. READ MORE

  4. 17. Ion dynamics and structure of collisionless shocks

    Author : Andreas Johlander; Andris Vaivads; Rami Vainio; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES;

    Abstract : Shock waves are responsible for slowing down and heating supersonic flows. In collisionless space plasmas, shocks are able to accelerate particles to very high energies. We study injection of suprathermal ions at Earth’s quasi- parallel shock using high time resolution data from the Cluster spacecraft. READ MORE

  5. 18. Molecular Dynamics Studies of Low-Energy Atom Impact Phenomena on Metal Surfaces during Crystal Growth

    Author : Dragan Adamovic; Peter Münger; Thomas Michely; Linköpings universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Molecular dynamics simulations; Low energy Ion irradiation; Atomistic processes; Thin film growth; Physics; Fysik;

    Abstract : It is a well-known fact in the materials science community that the use of low-energy atom impacts during thin film deposition is an effective tool for altering the growth behavior and for increasing the crystallinity of the films. However, the manner in which the incident atoms affect the growth kinetics and surface morphology is quite complicated and still not fully understood. READ MORE

  6. 19. Classical and Car-Parrinello Molecular Dynamics Simulations of Polyvalent Metal Ions in Water

    Author : Sami Amira; Kersti Hermansson; Imre Bako; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Inorganic chemistry; Car-Parrinello molecular dynamics simulations; ab initio calculations; ion; copper; aluminium; metal ion; water; aqueous solution; solvation; Oorganisk kemi; Inorganic chemistry; Oorganisk kemi;

    Abstract : The aqueous solvation of metal ions is one of the long-standing and complex problems in chemistry, with implications for and applications in a broad range of biochemical and electrochemical systems, where water is the all-pervasive medium.This thesis describes computer simulations of Al3+(aq), Fe2+(aq), Fe3+(aq) and Cu2+(aq). READ MORE

  7. 20. Microtubule and chromosome dynamics during mitosis in budding yeast

    Author : Alexander Julner Dunn; Karolinska Institutet; Karolinska Institutet; []
    Keywords : ;

    Abstract : As a cell divides, DNA must be replicated and faithfully segregated between the mother and daughter cells. This segregation is facilitated by the mitotic spindle, assembled to pull sister chromatids apart as the cell divides. READ MORE