Search for dissertations about: "Escape"

Showing result 1 - 5 of 375 swedish dissertations containing the word Escape.

  2. 1. Ion escape from Mars : measurements in the present to understand the past

    Author : Robin Ramstad; Stas Barabash; Yoshifumi Futaana; David Brain; Umeå universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Mars; escape; solar wind; evolution; CME; coupling; plasma; atmosphere; Space Physics; rymdfysik;

    Abstract : Present-day Mars is a cold and dry planet with a thin CO2-dominated atmosphere comprising only a few ­­­mbar pressure at low altitudes. However, the Martian surface is marked with valley networks, hydrated mineral clays, carbonates and the remains of deltas and meandering rivers, i.e. READ MORE

  4. 2. Escape to space or return to venus : ion flows measured by venus express

    Author : Moa Persson; Yoshifumi Futaana; Hans Nilsson; Maria Hamrin; Dmitrij Titov; Umeå universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Venus; water; escape; planetary physics; oxygen; O ; hydrogen; H ; ions; space physics; space plasma physics; Venus Express; ASPERA-4; IMA; spacecraft measurements; rymd- och plasmafysik; Space and Plasma Physics;

    Abstract : The present-day Venusian atmosphere is crushingly dense, extremely hot and arid. Yet, in its early history, Venus presumably had a massive amount of water, which, if spread evenly over the surface, provided a water depth of 10s to 100s of meters. Therefore, over the course of the atmospheric evolution, the water must have been removed from Venus. READ MORE

  5. 3. Essays on Uncertainty and Escape in Trade Agreements

    Author : Mathias Herzing; Henrik Horn; Harry Flam; Daniel J. Kovenock; Stockholms universitet; []
    Keywords : SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Trade Agreements; Uncertainty; Escape; Repeated Games; Hidden Information; Safeguards; Trade Liberalization; WTO; Economics; Nationalekonomi;

    Abstract : This thesis comprises three theoretical essays on trade agreements."Can Self-Destructive Trade Agreements Be Optimal?" focuses on the impact of hidden information on strategic interaction in the context of trade agreements. READ MORE

  6. 4. Ion escape from Mars

    Author : Qi Zhang; Mats Holmström; Xiao-Dong Wang; Shahab Fatemi; Hans Nilsson; David Andrews; Umeå universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES;

    Abstract : When the solar wind reaches the Mars obstacle, mass loading by planetary ions slows down the solar wind and raises the bow shock. The Martian atmosphere is undergoing the a scavenging by the solar wind without the protection of a global magnetic field. Atmospheric escape is an important process for the evolution of the Martian climate. READ MORE

  7. 5. Escape flight in butterflies

    Author : Maria Almbro; Cecilia Kullberg; Ronald Rutowski; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Flight; Lepidoptera; gamete load; lipid accumulation; predation risk; hibernation; Biology; Biologi; zoologi; Zoology;

    Abstract : Flight is considered to be the overarching reason for the enormous diversity and world-wide abundance of insects. Not only does flight enable great distances to be covered and new areas to be colonised, flying has also evolved to be important in most adult life-history characteristics from reproduction to anti-predator strategies. READ MORE