Sökning: "impurity"

Visar resultat 21 - 25 av 142 avhandlingar innehållade ordet impurity.

  1. 21. Striving for purity : interviews with people with malodorous exuding ulcers and their nurses

    Författare :Elisabeth Lindahl; Ingegerd Bergbom; Umeå universitet; []
    Nyckelord :ulcers; malodour; purity; consolation; phenomenological hermeneutics; qualitative content analysis; omvårdnadsforskning med medicinsk inriktning; Caring Sciences;

    Sammanfattning : The overall purpose of this thesis is two-fold; to illuminate the meaning of living with ‘impurity’ in terms of malodorous exuding ulcers, and the meaning of caring for people with ‘impure’ bodies in institutions and in people’s homes. The thesis comprises four papers based on studies using qualitative methods. LÄS MER

  3. 22. Studies of Topological Superconductors via Defects

    Författare :Oladunjoye Awoga; Annica Black-Schaffer; Pascal Simon; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Physics with spec. in Atomic; Molecular and Condensed Matter Physics; Fysik med inriktning mot atom- molekyl- och kondenserande materiens fysik;

    Sammanfattning : Defects from impurities, edges, junctions or domain walls have local detrimental effects on the superconducting state. Defects are also important in topological superconductors, and useful in studying the properties of the superconducting order parameter. LÄS MER

  4. 23. Plasma-Facing Components in Tokamaks : Studies of Wall Conditioning Processes and Plasma Impact on Diagnostic Mirrors

    Författare :Álvaro García Carrasco; Marek Rubel; Marco Cecconello; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Plasa-wall interactions; wall conditioning; tracers; diagnostic mirrors; ICWC; Physics; Fysik;

    Sammanfattning : Understanding of material migration and its impact on the formation of co-deposited mixed material layers on plasma-facing components is essential for the development of fusion reactors. This thesis focuses on this topic. It is based on experiments performed at JET and TEXTOR tokamaks. LÄS MER

  5. 24. Electron microscopy of ion implanted silicon carbide

    Författare :Per Persson; Linköpings universitet; []
    Nyckelord :;

    Sammanfattning : This thesis investigates structural defects into Silicon Carbide (SiC) in processed Al and B ion implantated samples. Ion implantation is currently the preferred way to introduce impurity atoms into the SiC crystal lattice. The structural defects found was concluded to be extrinsic dislocation loops composed of excess Si interstitials. LÄS MER

  7. 25. Strongly Correlated Models in One Dimension from a Density Matrix Renormalization Group Perspective

    Författare :Stefan Rommer; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; matrix product states; impurities; density matrix renormalization group; Heisenberg model; spin chain; DMRG;

    Sammanfattning : The density matrix renormalization group (DMRG) is a numerical method for studying low dimensional strongly correlated models. The study of these models is one of the most active areas of condensed matter physics today and has been spurred not only by the discovery of high temperature superconductivity but also by experiments on new compounds. LÄS MER