Search for dissertations about: "Gunnar Hellström"

Showing result 1 - 5 of 19 swedish dissertations containing the words Gunnar Hellström.

  2. 1. Parallel computing of fluid flow through porous media

    Author : Gunnar Hellström; Luleå tekniska universitet; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Strömningslära; Fluid Mechanics;

    Abstract : Fluid flow through porous media takes place in a variety of technical areas including ground water flow, flow through embankment dams, paper making, composites manufacturing, filtering, drying and sintering of iron ore pellets. When modelling these kinds of flows it is common practice to use averaging techniques rather than computing the detailed flow field in every single pore. READ MORE

  4. 2. Physiological and pathophysiological cerebrovascular regulation monitored by transcranial doppler

    Author : Gunnar Hellström; Karolinska Institutet; Karolinska Institutet; []
    Keywords : ;

    Abstract : Transcranial Doppler ultrasonography (TCD) became available in the middle of the 1980s as a new technique for examining cerebral circulation. With this technique it is possible to measure the velocity of blood flow in major cerebral arteries. READ MORE

  5. 3. Internal erosion in embankment dams : fluid flow through and deformation of porous media

    Author : J. Gunnar I. Hellström; Thanasis D. Papathanasiou; Luleå tekniska universitet; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Strömningslära; Fluid Mechanics;

    Abstract : A basic understanding of fluid flow through a porous media facilitates a comprehensive understanding of internal erosion in embankment dams. Hence, it is necessary to reveal the detailed seepage flow, the flow-induced forces acting within the porous media and the fluid flow deformation of the porous media. READ MORE

  6. 4. The clinical perspective on malignancies in renal transplanted patients

    Author : Vivan Hellström; Tomas Lorant; Gunnar Tufveson; Gunilla Enblad; Per Lindnér; Uppsala universitet; []
    Keywords : renal transplantation; malignant tumours;

    Abstract : Post-transplant malignancies cause significant morbidity and mortality. In this thesis we investigated malignancies in renal transplanted patients from a clinical viewpoint. The use of regional tumour registries considerably improved identification of pre- and post-transplant malignancies, which are generally underreported in transplant registries. READ MORE

  7. 5. Modelling flow over rough surfaces in hydropower waterways

    Author : Robin Andersson; Staffan Lundström; J. Gunnar I. Hellström; Patrik Andreasson; Jochen Aberle; Luleå tekniska universitet; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Strömningslära; Fluid Mechanics;

    Abstract : .... READ MORE