Search for dissertations about: "Cluster analysis"

Showing result 21 - 25 of 486 swedish dissertations containing the words Cluster analysis.

  2. 21. Cluster Observations and Theoretical Explanations of Broadband Waves in the Auroral Region

    Author : Marie Backrud; Jan-Erik Wahlund; Mats André; David Knudsen; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Space and plasma physics; ion acoustic waves; auroral region; anomalous resistivity; Cluster; Rymd- och plasmafysik; Space physics; Rymdfysik;

    Abstract : Broadband extremely low-frequency wave emissions below the ion plasma frequency have been observed by a number of spacecraft and rockets on auroral field lines. The importance of these broadband emissions for transverse ion heating and electron acceleration in the auroral regions is now reasonably well established. READ MORE

  4. 22. Pores, inclusions and electromagnetic stirring : Topics from the continuous casting of steel

    Author : Arash Safavi Nick; Pär Jönsson; Michael Vynnycky; Jesper H. Hattel; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; Teknisk materialvetenskap; Materials Science and Engineering;

    Abstract : This thesis deals with two topics of relevance to the continuous casting of steel,in view of their importance as regards the quality of the final solidified structure.The first concerns the precipitation of gas pores and inclusions in the interden-dritic region of the solidifying metal. READ MORE

  5. 23. Computer simulations of condensed phases with icosahedral local order

    Author : Sergei Simdyankin; Paul Madden; Stockholms universitet; []
    Keywords : SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; simple liquids; glasses; liquid-glass transition; Frank-Kasper phase; molecular dynamics; phonon dispersion; normal-mode analysis; wavelet analysis; numerisk analys; Numerical Analysis;

    Abstract : Understanding the fundamental aspects, and the formation mechanisms of glasses remains an outstanding unsolved problem of condensed-matter physics.Glass-formation in simple atomic systems is generally associated with the icosahedral local order. READ MORE

  6. 24. Towards Anti-Virulence Antimicrobials, Discovery and Development of Sortase A Inhibitors and Investigations of Bacterial Phenotypes

    Author : Patrick M. Wehrli; Göteborgs universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Sortase A; SrtA; Inhibitors; Anti-virulence; Bacterial analysis; FTIR spectroscopy; Bacterial phenotyping; Design of Experiment; Multivariate Data Analysis; PCA; ToF-SIMS; Time-of-flight secondary-ion-mass-spectrometry; Lipid analysis; ppGpp; Stringent response;

    Abstract : Antibiotic resistance is an emerging and serious threat to public health. Immediate actions are required to preserve current antibiotics while intensifying research efforts towards the development of new effective therapeutics. READ MORE

  7. 25. Rough beginnings : Executive function in adolescents and young adults after preterm birth and repeat antenatal corticosteroid treatment

    Author : Johanna Stålnacke; Ann-Charlotte Smedler; Hans Forssberg; Peter Anderson; Stockholms universitet; []
    Keywords : SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; cognitive flexibility; cluster analysis; development; latent variable analysis; longitudinal studies; parental education; perinatal medical complications; person-oriented approach; structural equation modeling; working memory; Psychology; psykologi;

    Abstract : This thesis investigates long-term cognitive outcome in two cohorts of adolescents and young adults exposed to stressors during the perinatal period: one group born preterm (.... READ MORE