Sökning: "lund model"
Visar resultat 21 - 25 av 728 avhandlingar innehållade orden lund model.
21. First determination of the electric charge of the top quark
Sammanfattning : In this thesis, the first determination of the electric charge of the top quark is presented using 370pb-1 of data recorded by the DØ detector at the Fermilab Tevatron accelerator. ttbar events are selected with one isolated electron or muon and at least four jets out of which two are b-tagged by reconstruction of a secondary decay vertex (SVT). LÄS MER
22. Lithium formate EPR dosimetry for accurate measurements of absorbed dose in radiotherapy
Sammanfattning : Lithium formate has shown to be a material with properties suitable for electron paramagnetic resonance (EPR) dosimetry, among them up to 7 times higher sensitivity compared to alanine, which is a well-established EPR detector material for dose determinations in radiotherapy.The aim of this thesis was to further investigate the properties of lithium formate and develop the dosimetry system towards applications in radiotherapy. LÄS MER
23. Möjlighet till aktivitet och delaktighet utanför hemmet för personer med förvärvad hjärnskada
Sammanfattning : Det övergripande syftet med denna avhandling var att öka kunskapen om möjlighet till aktivitet och delaktighet utanför hemmet för personer i yrkesverksam ålder med förvärvad hjärnskada (FHS).Studie I syftade till att utforska och beskriva hur personer med FHS erfar engagemang i aktiviteter utanför hemmet. LÄS MER
24. From Particle-Production Cross Sections to KERMA and Absorbed Dose for the Case 96 MeV n-12C Interactions
Sammanfattning : Neutron-carbon interactions have been studied with a focus on charged-particle production of relevance to radiation protection and medical applications, such as cancer therapy. The measurements have been performed using the particle-detection setup, MEDLEY, and the 96 MeV neutron beam at the The Svedberg Laboratory in Uppsala. LÄS MER
25. Geant4 Monte Carlo Simulations of the International Space Station Radiation Environment
Sammanfattning : A detailed characterization of the proton and neutron induced radiation environment onboard Columbus and the International Space Station (ISS) has been carried out using the Geant4 Monte Carlo particle transport toolkit. Dose and dose equivalent rates, as well as penetrating particle spectra corresponding to incident trapped protons, GCR protons, SPE protons and cosmic ray albedo neutrons are presented. LÄS MER