Sökning: "strain effect"

Visar resultat 1 - 5 av 669 avhandlingar innehållade orden strain effect.

  1. 1. Effect of valve replacement for aortic stenosis on ventricular function

    Författare :Ying Zhao; Michael Henein; Per Lindqvist; Eugenio Picano; Umeå universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Aortic stenosis; aortic valve replacement; echocardiography; speckle tracking; exercise echocardiography; ventricular function; septal radial motion; twist; displacement; strain; strain rate;

    Sammanfattning : Background：Aortic stenosis (AS) is the commonest valve disease in the West. Aortic valve replacement (AVR) remains the only available management for AS and results in improved symptoms and recovery of ventricular functions. LÄS MER

  3. 2. Modelling of the Fletcher-Gent effect and obtaining hyperelastic parameters for filled elastomers

    Författare :Rickard Österlöf; Leif Kari; Per-Erik Austrell; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; filled elastomers; natural rubber; carbon black; Fletcher-Gent effect; Payne-effect; finite strain; hyperelastic;

    Sammanfattning : The strain amplitude dependency , i.e. the Fletcher-Gent effect and Payne effect, and the strain rate dependency of rubber with reinforcing fillers is modelled using a modified boundary surface model and implemented uniaxially. LÄS MER

  4. 3. Growth of high quality Fe thin films : A study of the effect of mismatch strain on the physical properties of Fe

    Författare :Anna Lena Ravensburg; Vassilios Kapaklis; Björgvin Hjörvarsson; Tomas Kubart; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; thin film growth; crystal quality; strain; magnetism; electronic transport; Fysik; Physics;

    Sammanfattning : The work in this licentiate is devoted to investigating the epitaxial growth of thin Fe layers on MgAl2O4 (001) and MgO (001) substrates using dc magnetron sputtering. The aim is to qualitatively and quantitatively determine the crystal quality of the grown Fe layers depending on their thickness, substrate material, and selected deposition parameters. LÄS MER

  5. 4. The widowhood effect : Studies on mortality among Swedish widows and widowers

    Författare :Filip Dabergott; Sven Drefahl; Sunnee Billingsley; Kelfve Susanne; Stockholms universitet; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; widowhood; mortality trends; population aging; gender; socioeconomic status; sociologisk demografi; Sociological Demography;

    Sammanfattning : Spousal loss is a common experience associated with old age, and a major life-event that entails a period of intense suffering for most individuals. In addition to emotional shock and grief, the period after spousal loss is often characterized by vast changes in many areas of the surviving spouse’s life, from everyday habits to financial security. LÄS MER

  7. 5. Baggy paper webs : Effect of uneven moisture and grammage profiles in different process steps

    Författare :Cecilia Land; Lennart Stolpe; Kaarlo Niskanen; Karlstads universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; bagginess; drying; calendering; grammage; moisture content; paper; profile; reels; softwood kraft pulp; storage; strain; tension; web; Chemical Engineering; Kemiteknik;

    Sammanfattning : One of the problems encountered in paper converting is caused by the occurrence of "baggy webs", which essentially is when the tension profile of the paper web is uneven. In an area with low tension the paper is longer, which results in bagginess. LÄS MER