Essays about: "differentiell expansion"

Found 2 essays containing the words differentiell expansion.

  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. SENSITIVITY STUDIES ON THE THERMAL MODEL OF A SOLAR STEAM TURBINE

    University essay from KTH/Energiteknik

    Author : LUCA CALIANNO; [2016]
    Keywords : Steam turbine; start-up; transient; differential expansion; Nusselt correlation; heat transfer.; Ångturbiner; uppstart; transienter; differentiell expansion; Nusselt korrelation; värmeöverföring.;

    Abstract : Förr i tiden, ångturbiner har främst använts för baskraft operation. Numera med den ökade utvecklingen av varierande förnyelsbara är samma ångturbiner motstå högre cykliska operativa system med mer frekvent uppstarter och snabbt föränderliga laster. READ MORE