Sökning: "Erik Marklund"

Visar resultat 1 - 5 av 8 avhandlingar innehållade orden Erik Marklund.

  1. 1. Micromechanism based material models for natural fiber composites

    Författare :Erik Marklund; Luleå tekniska universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Polymera konstruktionsmaterial; Polymeric Composite Materials;

    Sammanfattning : The objective of Paper A was to develop a material model which includes all nonlinear viscoelastic phenomena observed in compressive tests on vinyl ester specimens using experimental data. The constitutive model developed by Schapery in the particular form previously presented by Megnis and Varna is used. LÄS MER

  3. 2. Modeling the mechanical performance of natural fiber composites

    Författare :Erik Marklund; Luleå tekniska universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Polymera konstruktionsmaterial; Polymeric Composite Materials;

    Sammanfattning : Due to environmental concerns the interest in use of renewable and recyclable materials has dramatically increased over the recent years. Wood and other lignocellulosic fiber reinforced polymers have large potential as structural materials due to the high specific stiffness, high specific strength and high aspect ratio of the fibers. LÄS MER

  4. 3. Gas-Phase Protein Structure Under the Computational Microscope : Hydration, Titration, and Temperature

    Författare :Erik Marklund; David van der Spoel; Albert Heck; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Molecular dynamics; gas phase; proteins; micelles; proton transfer; Grothuss mechanism; kinetics; Physics; Fysik; Physics with specialization in Biophysics; Fysik med inriktning mot biofysik;

    Sammanfattning : Although the native environment of the vast majority of proteins is a complex aqueous solution, like the interior of a cell, many analysis methods for assessing chemical and physical properties of biomolecules require the sample to be aerosolized; that is, transferred to the gas-phase. An important example is electrospray-ionization mass spectrometry, which can provide a wide range of information about e. LÄS MER

  5. 4. Treatment oriented waste characterization

    Författare :Erik Marklund; Lale Andreas; Anders Lagerkvist; Jurate Kumpiene; Bernd Bilitewski; Luleå tekniska universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Avfallsteknik; Waste Science and Technology;

    Sammanfattning : New types of materials and products are developed every day, and subsequently, new types of wastes. At the same time, new regulations are put forth to protect human health and the ecosystems from the negative impacts of wastes. LÄS MER

  7. 5. Employability perceptions : Nature, determinants, and implications for health and well-being

    Författare :Erik Berntson; Magnus Sverke; Staffan Marklund; Jan Johansson Hanse; Stockholms universitet; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; employability; employability perceptions; flexibility; individualisation; changing labour market; self-evaluation; self-efficacy; dual labour market; human capital; health; well-being; Psychology; Psykologi; psykologi; Psychology;

    Sammanfattning : The general aim of the present thesis is to increase our understanding of perceived employability. Employability perceptions refer to individuals’ beliefs about their possibilities of finding new, equal, or better employment. LÄS MER