Sökning: "Gunnar Eriksson"

Visar resultat 1 - 5 av 32 avhandlingar innehållade orden Gunnar Eriksson.

  1. 1. Solitons, vortices and shell structure in ultracold atomic quantum systems

    Författare :Gunnar Eriksson; NanoLund: Centre for Nanoscience; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; few-body physics; finite-size effects; solitary waves; quantized vortices; quantum hysteresis; shell structure; dipolar interactions; Fysicumarkivet A:2020:Eriksson;

    Sammanfattning : This dissertation deals with finite-size effects in a few different quantum many-body phenomena in ultracold atomic systems. The finite-sized systems were simulated numerically using both mean-field methods and methods beyond mean-field, e.g. quadratic configuration interaction and exact diagonalization. LÄS MER

  3. 2. Combustion of solid waste from wood-based ethanol production

    Författare :Gunnar Eriksson; Luleå tekniska universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Energy Engineering; Energiteknik;

    Sammanfattning : The solid residue from wood-based ethanol production has a low ash content and high heating value, making it interesting for combustion applications, e.g. small-scale appliances and gas turbines. Combustion and gasification properties have been studied using thermogravimetric analysis (TGA) and differential thermal analysis (DTA). LÄS MER

  4. 3. Residues from biochemical production of transport biofuels in Northern Europe : combustion properties and applications

    Författare :Gunnar Eriksson; Bengt Johan Skrifvars; Luleå tekniska universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Energy Engineering; Energiteknik;

    Sammanfattning : Residues from biochemical production of liquid transport biofuels will probably become available for energy use if more gasoline and diesel is substituted. For processes used in northern Europe they amount to 35-65 % of the feedstock energy and despite interest from energy companies, their fuel properties are largely unknown. LÄS MER

  5. 4. Displacement Washing in the Sulfate Pulp Mill

    Författare :Gunnar Eriksson; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; metal ions; Kraft pulp; models; diffusion; filter cakes; sorption; temperature; lignin; fibers; washing; lime mud; chemical recovery; displacement; pulp washing;

    Sammanfattning : Displacement washing is an operation in which it is possible to wash solid-phase particles with a minimum of water. In a sulfate pulp mill, the main application is the pulp washing, but lime mud washing also occurs in the chemical recovery. The washing consumes a great deal of water. LÄS MER

  7. 5. Företagets immateriella investeringar : En begreppsutredning = Intangibles as an object for capital investment

    Författare :Gunnar Eriksson; Linköpings universitet; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Intangibles; capita! investment; investment processes; conceptualization; expenditure allocation; routine activity; non-marginalism; accounting principles; deferred charges.;

    Sammanfattning : Normally the concept of capita! investment refers to tangibles. The resource allocation process deals in this case with the problem of acquiring different kinds of "physical facilities". However, if the concept of capita! investment is made to apply to intangibles, the question of definition becomes confusing. LÄS MER