Sökning: "Tube shape"

Visar resultat 11 - 15 av 37 avhandlingar innehållade orden Tube shape.

  1. 11. Wnt signaling affects cell adhesion and neuronal differentiation

    Författare :Maria Lindqvist; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :;

    Sammanfattning : The mammalian central nervous system (CNS) consists of the brain and the spinal cord. The entire CNS is derived from the walls of a fluid-filled neural tube that is formed at an early stage of embryonic development. The tube itself becomes the adult ventricular system. LÄS MER

  3. 12. Turbulent burning, flame acceleration, explosion triggering

    Författare :V'yacheslav Akkerman; Vitaly Bychkov; Geoffrey Searby; Umeå universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Turbulent combustion; flame acceleration; detonation explosion triggering; direct numerical simulations; Physics; Fysik;

    Sammanfattning : The present thesis considers several important problems of combustion theory, which are closely related to each other: turbulent burning, flame interaction with walls in different geometries, flame acceleration and detonation triggering. The theory of turbulent burning is developed within the renormalization approach. LÄS MER

  4. 13. CFD driven optimization of hydraulic turbine draft tubes using surrogate models

    Författare :Daniel Marjavaara; Luleå tekniska universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Strömningslära; Fluid Mechanics;

    Sammanfattning : The efficiency of a hydraulic reaction turbine is significantly affected by the performance of its draft tube. The shape and velocity distribution at the inlet are, in next turn, two main factors that affects the performance of the draft tube. LÄS MER

  5. 14. Lipid Nanotubes as a Model for Highly Curved Cellular Membrane Structures

    Författare :Natalia Stepanyants; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : Cells and their organelles show a variety of membrane morphologies with multiplesubmicrometer features, for example, tubules, vesicles, folds and pores. The shape of thecellular membranes can dynamically change to support a variety of functions, such as cargotransport, transmission of signals between the cells, cell movement and division. LÄS MER

  7. 15. Fast devolatilization of biomass : An experimental study using high-speed imaging, relevant for suspension firing technologies

    Författare :Angel David Garcia Llamas; Kentaro Umeki; Florian Schmidt; Luleå tekniska universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Energiteknik; Energy Engineering;

    Sammanfattning : We have performed experiments using imaging techniques in a flame-assisted, drop-tube reactor with optical access, to extract information relevant to the improvement of multi-particle devolatilization models. These models could be of interest for different suspension firing techniques, such as entrained flow biomass gasification, (EFBG) and oxyfuel combustion. LÄS MER