Sökning: "fysikum"

Visar resultat 21 - 25 av 496 avhandlingar innehållade ordet fysikum.

1. 21. Characterizing the X-ray Properties of Clusters of Galaxies

   Författare :Karl Andersson; Ariel Goobar; Andrew Fabian; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Physics; Fysik; Physics; fysik;

   Sammanfattning : Clusters of galaxies are the most massive bound structures known and represent a fair sample of the baryonic and dark matter content of the universe. The hot baryonic gas present in cluster dark matter halos cause them to emit in the X-ray band. LÄS MER

3. 22. Structure, Bonding and Chemistry of Water and Hydroxyl on Transition Metal Surfaces

   Författare :Klas Andersson; Anders Nilsson; Falko Netzer; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; core-level spectroscopy; surface chemistry; water; hydroxyl; metal surfaces; adsorption; structure; hydrogen bonding; Chemical physics; Kemisk fysik;

   Sammanfattning : The structure, bonding and chemistry of water and hydroxyl on metal surfaces are presented. Synchrotron based x-ray photoelectron- and x-ray absorption spectroscopy along with density functional theory calculations mainly form the basis of the results. LÄS MER

4. 23. FTS Studies of diatomic molecules of supposed astrophysical interest

   Författare :Nils Andersson; Indrek Martinsson; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Astronomy and astrophysics; Astronomi och astrofysik; Physics; fysik;

   Sammanfattning : .... LÄS MER

5. 24. Holonomy in Quantum Information Geometry

   Författare :Ole Andersson; Ingemar Bengtsson; Boris Shapiro; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Theoretical Physics; teoretisk fysik; Physics;

   Sammanfattning : In this thesis we provide a uniform treatment of the two most popular non-adiabatic geometric phases for dynamical systems of mixed quantum states, namely those of Uhlmann and of Sjöqvist et al. We develop a holonomy theory for the latter which we also relate to the already existing theory for the former. LÄS MER

7. 25. Improving the therapeutic ratio of stereotactic radiosurgery and radiotherapy

   Författare :Bahram Andisheh; Bengt Lind; John Hopewell; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; optimization; stereotactic radiosurgery; stereotactic radiotherapy; radiobiology; modeling; Medical Radiation Physics; medicinsk strålningsfysik;

   Sammanfattning : New methods of high dose delivery, such as intensity modulated radiation therapy (IMRT), stereotactic radiation therapy (SRT) or stereotactic radiosurgery (SRS), hadron therapy, tomotherapy, etc., all make use of a few large fractions. LÄS MER