Essays about: "Anders Simon"

Found 5 essays containing the words Anders Simon.

  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. Formation of super-Earths via pebble accretion onto planetesimals

    University essay from Lunds universitet/Astronomi - Genomgår omorganisation

    Author : Daniel Mikkola; [2015]
    Keywords : planet; formation; planet formation; exoplanets; pebble; accretion; pebble accretion; Physics and Astronomy;

    Abstract : Data from NASA's Kepler space telescope, which searches for exoplanets via the transit method, produced 1108 new planetary candidates in 2013 with a total of 91% being smaller than Neptune in size. These were mostly super-Earths, terrestial planets between Earth and Neptune in size, with orbits around 10 days. READ MORE

  4. 3. The Effects of Asset Return Correlation Errors in the Creditmetrics Framework

    University essay from KTH/Matematik (Inst.)

    Author : Simon Gunnarsson; Anders Lundstedt; [2011]
    Keywords : ;

    Abstract : To determine risk of a bond portfolio one might assume that the obligors' asset returns follow a multivariate normal distribution with certain correlations. We investigate how errors in the estimates of these correlations aect portfolio risk measures, where the CreditMetrics framework is used to model portfolio behavior. READ MORE

  5. 4. An Analysis of Diagnostic Test Performance with Regard to Dispersion Among Individuals

    University essay from KTH/Reglerteknik

    Author : Anders Simon; [2009]
    Keywords : ;

    Abstract : The methods used today at Scania to test and calibrate diagnostic tests are often carried out given data from only a few trucks. This is due to the expenses and vast amount of time associated with collecting data. The dispersion between different sensor individuals is thus not included in the evaluation of a diagnostic test. READ MORE

  6. 5. An Interdisciplinary Study on Farm Based Biogas Production in Southern Brazil

    University essay from Sektionen för ekonomi och teknik (SET)

    Author : Anders Hjort; Simon Norin; [2008]
    Keywords : Applications; Biogas; Brazil; Digestate; Environmental impact; Pig slurry;

    Abstract : Today the use of anaerobic digestion technique emerges as an alternative to the conventional treatment method of pig slurry to the pig producers in Brazil because of the energy demanding intensive pig production and the negative environmental impact that arises during storage and use. The end products of AD technique are biogas as an energy source and digestate that can be used as a fertilizer. READ MORE