Sökning: "comet"
Visar resultat 1 - 5 av 54 avhandlingar innehållade ordet comet.
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. Skol-Komet : Tre utvärderingar av ett program för beteendeorienterat ledarskap i klassrummet
Sammanfattning : Children who express externalizing behaviors in school are at greater risk of school failure and peer rejection. They are also at greater risk of developing antisocial behaviors, addiction to drugs, mental health problems and delinquency. Many teachers experience difficulties in working with pupils expressing externalizing behaviors. LÄS MER
3. Rosetta spacecraft potential and activity evolution of comet 67P
Sammanfattning : The plasma environment of an active comet provides a unique setting for plasma physics research. The complex interaction of newly created cometary ions with the flowing plasma of the solar wind gives rise to a plethora of plasma physics phenomena, that can be studied over a large range of activity levels as the distance to the sun, and hence the influx of solar energy, varies. LÄS MER
4. Evolving the Methodology for Detection of Primary DNA Damage : Development, adaptation and assessment of the single cell gel electrophoresis (comet) assay
Sammanfattning : Deoxyribonucleic acid (DNA) is one of the most important molecules in nature. It is the fundamental carrier of evolutionary information and constitutes the genetic blueprint of all living organisms. Being the sole source of information, it is vital for the cell to transmit the correct genetic information from generation to generation. LÄS MER
5. The effect of spacecraft charging on low-energy ion measurements around comet 67P/Churyumov-Gerasimenko
Sammanfattning : A spacecraft in space interacts with the surrounding environment and aqcuires an electrostatic potential. Charged particles are constantly bombarding the surface of the spacecraft, and at the same time solar EUV radiation induces photoemission, causing electrons to be emitted from the surface. LÄS MER
