Sökning: "Erik Johansson"

Visar resultat 6 - 10 av 129 avhandlingar innehållade orden Erik Johansson.

  1. 6. Computed Tomography and Fingerprint Traceability in the Wood Industry

    Författare :Erik Johansson; Luleå tekniska universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Träteknik; Wood Technology;

    Sammanfattning : The purpose of the work described in this thesis was to develop techniques based on non-invasive measurements of logs and sawn timber that would increase the profitability of the wood industry in general and sawmills in particular. The work has two main focus areas: computed tomography (CT) scanning of logs and traceability of wood products. LÄS MER

  3. 7. Computed tomography of sawlogs : knot detection and sawing optimization

    Författare :Erik Johansson; Johan Carlson; Luleå tekniska universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Träteknik; Wood Technology;

    Sammanfattning : Branches on trees introduce defects on sawn timber called knots. By scanning sawlogs using computed tomography, knots can be detected and accounted for so that the sawing process can be optimized with respect to outgoing product value. LÄS MER

  4. 8. Computed tomography of sawlogs : knot detection and sawing optimization

    Författare :Erik Johansson; RISE; []
    Nyckelord :;

    Sammanfattning : .... LÄS MER

  5. 9. Free radical mediated cellulose degradation

    Författare :Erik Johansson; KTH; []
    Nyckelord :free radicals; cellulose; polymer; average chain length; bleaching; TCF; ozone; degradation;

    Sammanfattning : This thesis addresses the mechanisms involved in cellulosedegradation in general and Totally Chlorine Free (TCF) bleachingof pulp in particular. The thesis shows that the cellulosedegradation during high consistency ozone bleaching is explainedby free radical chain reactions. LÄS MER

  7. 10. Nucleation and growth of CVD diamond films

    Författare :Erik Johansson; Uppsala universitet; []
    Nyckelord :NATURAL SCIENCES; NATURVETENSKAP;

    Sammanfattning : .... LÄS MER