Sökning: "esas"
Visar resultat 1 - 5 av 13 avhandlingar innehållade ordet esas.
1. Plasma environment of an intermediately active comet : Evolution and dynamics observed by ESA's Rosetta spacecraft at 67P/Churyumov-Gerasimenko
Sammanfattning : The subject of this thesis is the evolution and dynamics of the plasma environment of a moderately active comet before, during and after its closest approach to the Sun. For over 2 years in 2014-2016, the European Space Agency’s Rosetta spacecraft followed the comet 67P/Churyumov-Gerasimenko at distances typically between a few tens and a few hundred kilometers from the nucleus, the longest and closest inspection of a comet ever made. LÄS MER
2. The Jovian Plasma Dynamics and Composition Analyzer (JDC) for ESA's JUICE Mission
Sammanfattning : This dissertation covers the development and calibration of the Jovian plasma Dynamics and Composition analyzer (JDC). JDC is together with five other sensors a part of the Particle Environment Package (PEP), one of the payloads of the European Space Agency's JUpiter ICy moons Explorer (JUICE) mission. LÄS MER
3. Stellar kinematics in surveys and simulations
Sammanfattning : We study stellar motions in the Milky Way with N-body simulations and large astrometric samples from ESA's Gaia mission. We identify two kinematic populations for white dwarfs in the Solar neighbourhood. We also investigate the accreted halo and reveal two new structures. LÄS MER
4. The induced magnetospheres and magnetotails of Mars and Venus
Sammanfattning : In this work we focus on several aspects of the ionospheres, induced magnetospheres, and magnetotails of the unmagnetized planets Mars and Venus. The solar wind interaction with unmagnetized planets differs from the magnetized planets: they are more directly exposed to the solar wind, and consequently can respond faster and more dynamically to solar wind variations, necessitating careful analysis of the driving conditions upstream simultaneously with plasma measurements in the system. LÄS MER
5. Hopp hos döende patienter med cancer i palliativ hemsjukvård
Sammanfattning : Hope is meaningful and very important for people – even for people at the last days of their lives. Health professionals can sometimes describe hope in terms of hope for a cure, which may lead to feelings of hopelessness or empty hope for a patient with an incurable disease. LÄS MER