Sökning: "divergences"

Visar resultat 6 - 10 av 54 avhandlingar innehållade ordet divergences.

1. 6. Phylogenomic Analysis of Vertebrate Evolution

   Författare :Björn Hallström; Biologiska institutionen; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; mammals; phyogenetics; phylogenomics; vertebrates; evolution;

   Sammanfattning : The field of phylogenomics has emerged during the last five years, as the number of fully or partially sequenced genomes has increased rapidly. Using whole genomes for phylogenetic studies greatly increases the accuracy of the trees determined, and can potentially resolve phylogenetic questions that could not be resolved bu studies using only a few gene sequences. LÄS MER

3. 7. Molecular Phylogenetics of Mammals

   Författare :Morgan Kullberg; Biologiska institutionen; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Genetics; EST; divergence times; phylogenomics; phylogenetic reconstruction; Mammals; Eutheria; cytogenetics; Genetik; cytogenetik;

   Sammanfattning : In this thesis, the phylogenetic relationships of the Mammalia have been studied at various levels. Different sources of genetic information have been evaluated and used as phylogenetic markers. These include the well-known mitochondrial genome, cDNA from housekeeping genes and expressed sequence tags from nuclear genes. LÄS MER

4. 8. Karl-Birger Blomdahl et Ingvar Lidholm: Enjeux mélodiques, tonals et organiques des années 1940

   Författare :Cécile Bardoux Lovén; Jacob Derkert; Nicolas Meeùs; Pascal Decroupet; Stockholms universitet; []
   Nyckelord :HUMANIORA; HUMANITIES; Sweden; Blomdahl; Lidholm; Monday Group; the 1940s; melody; linearity; tonality; organicism; Jeppesen; Hindemith; Kurth; Schenker; Meyer; Rosenberg; anti-romanticism; absolute music; Musicology; musikvetenskap;

   Sammanfattning : Karl-Birger Blomdahl (1916-1968) and Ingvar Lidholm (1921- ) were two leading figures in modern Swedish music. While studying in Stockholm they created a study circle known as the Monday Group. Regarded as anti-romanticists, Blomdahl and Lidholm revitalized musical creation by prioritizing compositional technique (as in hantverk, i.e. LÄS MER

5. 9. Off-shell, maximal supersymmetry & exceptional geometry

   Författare :Anna Karlsson; Chalmers tekniska högskola; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Maximal supersymmetry; pure spinors; exceptional geometry; maximal supergravity; loop amplitudes; U-duality; high energy particle physics;

   Sammanfattning : Two lines of research are presented in this thesis, both with a focus on fundamental properties within the supersymmetric theories of high energy physics. The first features analyses based on the actions for maximal supersymmetric Yang–Mills theory and supergravity, provided by the pure spinor formalism. LÄS MER

7. 10. Semi Markov chain Monte Carlo

   Författare :Håkan Ljung; Uppsala universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Mathematics; Adaptive simulation; error-in-the-variables; Kullback-Leibler divergence; Markov chain simulation; Markov chain Monte Carlo; semi-regenerative; MATEMATIK; MATHEMATICS; MATEMATIK; matematisk statistik; Mathematical Statistics;

   Sammanfattning : The first paper introduces a new simulation technique, called semi Markov chain Monte Carlo, suitable for estimating the expectation of a fixed function over a distribution π, Eπf(χ). Given a Markov chain with stationary distribution p, for example a Markov chain corresponding to a Markov chain Monte Carlo algorithm, an embedded Markov renewal process is used to divide the trajectory into different parts. LÄS MER