Essays about: "Anders Kjerrgren"

Found 2 essays containing the words Anders Kjerrgren.

  1. 1. Galaxies as Clocks and the Universal Expansion

    University essay from KTH/Fysik

    Author : Anders Ahlström Kjerrgren; [2021]
    Keywords : cosmology; cosmic chronometers; universal expansion; Hubble parameter; differential ages; galaxy age; relative age; cosmic time; chi-square minimization; monte carlo sampling; gaussian processes; kosmologi; kosmisk kronometer; universums expansion; Hubbleparametern; differentiell ålder; galaxålder; relativ ålder; kosmisk tid; chi-2-minimering; monte carlo-sampling; gaussiska processer;

    Abstract : The Hubble parameter H(z) is a measure of the expansion rate of the universe at redshift z. One method to determine it relies on inferring the slope of the redshift with respect to cosmic time, where galaxy ages can be used as a proxy for the latter. This method is used by Simon et al. READ MORE

  3. 2. Introducing heterogeneities in biological neuronal network models with distance-dependent connectivity

    University essay from KTH/Skolan för teknikvetenskap (SCI)

    Author : Anders Kjerrgren; Max Larsson; [2018]
    Keywords : ;

    Abstract : Computational studies of biological neuronal network dynamics are often conducted on isotropic and homogeneous network models where all neurons are assumed to be identical. Here, we look at three different spatially extended networks and introduce heterogeneities in the connectivity. READ MORE