Essays about: "Petter Johansson"

Showing result 1 - 5 of 8 essays containing the words Petter Johansson.

  1. 1. Temporal spawning divergence in European whitefish (Coregonus lavaretus) : The first steps towards reproductive isolation in young populations (70-171 years)

    University essay from Umeå universitet/Institutionen för ekologi, miljö och geovetenskap

    Author : Petter Johansson; [2017]
    Keywords : Population divergence; Coregonus lavaretus; spawning whitefish; reproductive isolation; young populations;

    Abstract : A critical step in ecological speciation is the development of reproductive isolation. The processes leading up to reproductive isolation are difficult to study since they often occur over very long time periods. READ MORE

  3. 2. Temporal coherence in Salmo trutta in Swedish streams/rivers : Analyze of long term monitoring data on trout abundance in northern Sweden

    University essay from Umeå universitet/Institutionen för ekologi, miljö och geovetenskap

    Author : Petter Johansson; [2015]
    Keywords : ;

    Abstract : By using long-term monitoring data on trout (Salmo trutta) abundance in streams and rivers in northern Sweden synchronous patterns of trout abundance at both regional and local (i.e., within watershed) scales was investigated. READ MORE

  4. 3. Finding Value Through Sustainable Performance : A cross-sectional study of the relationship between risk-adjusted return and Environmental, Social and Governance performance on the Indian stock market

    University essay from Umeå universitet/Företagsekonomi

    Author : Christoffer Johansson; Petter Lundström; [2015]
    Keywords : ESG; India; Risk-adjusted return; Screening; Efficient markets;

    Abstract : Problem background and discussion: Emerging countries economies are growing substantially; one of these is India which stock market has been one of the best performing in the world in recent years. Analysts are forecasting further development and some claims that India has the most business- and investment-stimulating political leaders in the world. READ MORE

  5. 4. In search of a common terminology for mathematics and the physical world: Experience and reverse mathematics

    University essay from Göteborgs universitet/Institutionen för filosofi, lingvistik och vetenskapsteori

    Author : Petter Johansson; [2011-05-10]
    Keywords : ;

    Abstract : .... READ MORE

  6. 5. Pair Annihilation in a Laser Pulse

    University essay from Institutionen för fysik

    Author : Petter Johansson; [2011]
    Keywords : Pair Annihilation; Laser Pulses; XFEL; ELI; Strong Field QED; Intense Field QED;

    Abstract : The thesis analyses the process of pair annihilation into one photon in a laser pulse. The theory of how to include pulse shapes in Strong Field QED and the resulting cross section is presented. The cross section is calculated and estimated for lasers of ELI and XFEL facilites. READ MORE