Sökning: "Lars Mattsson"

Visar resultat 6 - 10 av 52 avhandlingar innehållade orden Lars Mattsson.

  1. 6. Modelling the Winds from Carbon Rich AGB Stars : Implications for Stellar Evolution and the Chemical Evolution of Galaxies

    Författare :Lars Mattsson; Uppsala universitet; []
    Nyckelord :;

    Sammanfattning : Stars on the AGB are known to lose mass at high rates (10-8 - 10-4 Msun/yr) through slow winds (20 km/s), enriching the inter stellar medium with newly synthesised elements. We explore how the mass loss for C-rich AGB stars depends on the basic stellar parameters by computing a large grid of wind models. LÄS MER

  3. 7. Integration and efficiency in marketing systems

    Författare :Lars-Gunnar Mattsson; Handelshögskolan i Stockholm; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES;

    Sammanfattning : This study was inspired by some recent changes in organization and structure of the distributive trades in Sweden. Attention is focused on various aspects of integration in marketing systems consisting of retail and wholesale units. LÄS MER

  4. 8. On the Winds of Carbon Stars and the Origin of Carbon : A Theoretical Study

    Författare :Lars Mattsson; Susanne Höfner; Nils Bergvall; Kjell Olofsson; Martin Groenewegen; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; AGB stars; carbon stars; mass loss; stellar winds; circumstellar matter; cosmic dust; stellar evolution; nucleosynthesis; galactic chemical evolution; Astronomy and astrophysics; Astronomi och astrofysik; Astronomy; Astronomi; Fysik; Physics;

    Sammanfattning : Carbon is the basis for life, as we know it, but its origin is still largely unclear. Carbon-rich Asymptotic Giant Branch (AGB) stars (carbon stars) play an important rôle in the cosmic matter cycle and may contribute most of the carbon in the Galaxy. LÄS MER

  5. 9. Essays on Efficiency, Productivity, and Impact of Policy

    Författare :Pontus Mattsson; Jonas Månsson; Lars Behrenz; Almas Heshmati; Linnéuniversitetet; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; conditional difference-in-differences cDiD ; courts; data envelopment analysis DEA ; Malmquist index; horizontal mergers; impacts of policy; stochastic frontier analysis SFA ; subsidized employment; total factor productivity TFP ; Törnqvist TFP index; Economics; Nationalekonomi;

    Sammanfattning : This thesis consists of five self-contained empirical essays centering on total factor productivity (TFP), efficiency, and impacts of policy.Essay I: “TFP Change and Its Components for Swedish Manufacturing Firms During the 2008-2009 Financial Crisis” (co-authored with Jonas Månsson and William H. Greene). LÄS MER

  7. 10. Formic acid adsorption and photodecomposition on rutile TiO2 (110) : An in situ infrared reflection absorption spectroscopy study

    Författare :Andreas Mattsson; Lars Österlund; Gunnar Niklasson; Claes-Göran Granqvist; Håkan Rensmo; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : TiO2 based photocatalysis is an emerging green nanotechnology that can be used forremoval of pollutants from water and air. It has had an increased research interest, bothfrom an application and fundamental point of view, during the last decades. LÄS MER