Search for dissertations about: "hastighet"

Showing result 1 - 5 of 236 swedish dissertations containing the word hastighet.

  2. 1. The tempo and mode of evolution : a neontological reappraisal

    Author : Melanie Monroe; Folmer Bokma; Pär Ingvarsson; Mikael Fortelius; Umeå universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; birds; extinction; macroevolution; mammals; microevolution; punctuated equilibrium; speciation;

    Abstract : The theory of “punctuated equilibrium” suggests that species evolve rapidly during or immediately upon speciation, “punctuating” long periods of little or no morphological evolution. Here I confirm that body size differences within clades of birds and mammals are best explained using a model of punctuated evolution. READ MORE

  4. 2. Effective Charges Near 56Ni and Production of Anti-Nuclei Studied with Heavy-Ion Reactions

    Author : Rickard du Rietz; Kärnfysik; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; RDDS; Nuclear physics; Kärnfysik; PHENIX; RHIC; mirror nuclei; shell-model calculations; fusion-evaporation reactions; effective charges; anti-deuteron; Heavy-ion reactions; Fysicumarkivet A:000;

    Abstract : This thesis presents the research performed within two different research groups using heavy-ion induced nuclear reactions. They offer the opportunity to investigate different properties of nuclear matter. The results are based on measurements using a variety of different experimental techniques. READ MORE

  5. 3. Numerical Studies of Mixing in Pipes and Static Mixers

    Author : Mårten Regner; Livsmedelsteknik; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Turbulent mixing; Secondary flow; Viscosity ratio; Computational fluid dynamics; Food and drink technology; Livsmedelsteknik; Rate of striation thinning; Static mixer; Laminar mixing;

    Abstract : The objective of the present work was to investigate the mixing process in static mixers under laminar flow conditions, and in pipes during the displacement of dissimilar liquids. A numerical scheme and a method of characterizing static mixers were developed. READ MORE

  6. 4. Nuclear motion in molecular ions studied with synchrotron radiation and multicoincidence momentum imaging spectrometry

    Author : Joakim Laksman; Synkrotronljusfysik; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Molecule; synchrotron;

    Abstract : A momentum imaging spectrometer optimized for photoionization experiments with synchrotron radiation was built in 2008. The spectrometer is equipped with an electrostatic lens, that focuses the charged dissociation products on to a position-sensitive multi-hit delay line anode. READ MORE

  7. 5. Methods for robust gain scheduling

    Author : Anders Helmersson; Lennart Ljung; Linköpings universitet; []
    Keywords : ;

    Abstract : Regulatorer används i många tillämpningar för att förbättra prestanda ochegenskaper hos fordon och farkoster av olika slag, t ex flygplan och raketer.Beroende på olika faktorer, som hastighet och höjd, kan dynamiken ochuppträdandet av dessa farkoster variera. READ MORE