Sökning: "Lars Börjesson"

Hittade 3 avhandlingar innehållade orden Lars Börjesson.

  1. 1. Coupled thermal, metallurgical and mechanical models of multipass welding

    Detta är en avhandling från Luleå : Luleå tekniska universitet

    Författare :Lars Börjesson; [1999]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Computer Aided Design; Datorstödd maskinkonstruktion;

    Sammanfattning : This thesis deals with modelling and simulation of thermo mechanical processes in multipass welding. The aim of the simulations is to predict the residual stresses and/or the deformations that occur after welding. These residual stresses and deformations are caused by the high temperature gradients due to the local heating. LÄS MER

  2. 2. Neuromuscular function in the normal and inflamed colon. An experimental study in rat

    Detta är en avhandling från Göteborg

    Författare :Lars Börjesson; Göteborgs universitet.; Gothenburg University.; [2000]
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; ATP; dextran sulphate sodium; DMPP; enteric nervous system; McN-A-343; nitric oxide; non-adrenergic; rat; second messenger; smooth muscle; VIP;

    Sammanfattning : Neuromuscular function of the longitudinal muscle layer of distal colon was investigated in segments from normal rats and from rats with colitis induced by dextran sulphate sodium (DSS) at 3% for 3 or 7 days or 5% for 7 days. The study was performed in vitro, on spontaneous tone, or after precontraction. LÄS MER

  3. 3. Added value from biomass by broader utilization of fuels and CHP plants

    Detta är en avhandling från Göteborg

    Författare :Christer Gustavsson; Roger Renström; Lars Nilsson; Pål Börjesson; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; biofuels; bioeconomy; pyrolysis; gasification; leaching; Miljö- och energisystem; Environmental and Energy Systems;

    Sammanfattning : The present work, where additional value-creating processes in existing combined heat and power (CHP) structures have been examined, is motivated by a political- and consumer-driven strive towards a bioeconomy and a stagnation for the existing business models in large parts of the CHP sector.The research is based on cases where the integration of flash pyrolysis for co-production of bio-oil, co-gasification for production of fuel gas and synthetic biofuels as well as leaching of extractable fuel components in existing CHP plants have been simulated. LÄS MER