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Visar resultat 11 - 15 av 416 avhandlingar som matchar ovanstående sökkriterier.

  1. 11. Aspects of adaptive mesh refinement in the spectral element method

    Författare :Nicolas Offermans; Philipp Schlatter; Ananias Tomboulides; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Error estimators; mesh refinement; adaptivity; spectral element method; algebraic multigrid method; NACA4412; periodic hill case.; Engineering Mechanics; Teknisk mekanik;

    Sammanfattning : This thesis deals with the improvement of the efficiency of numerical simulations in computational fluid dynamics. Some of the limitations of current algorithms on future exascale supercomputers are addressed with the main goal of using adaptive mesh refinement for the simulation of turbulent and three-dimensional flows. LÄS MER

  3. 12. Parastomal hernia : investigation and treatment

    Författare :Pia Näsvall; Karin Strigård; Jörgen Rutegård; Ulf Gunnarsson; Michael Dahlberg; Ingvar Syk; Umeå universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Parastomal; hernia; 3D US; ultrasonography; mesh; QoL; rectal cancer; stoma; Surgery; kirurgi;

    Sammanfattning : BackgroundParastomal hernia is a common stoma complication causing the patient considerable inconvenience. The patient becomes aware of a bulge around the stoma, but a bulge is not always a parastomal hernia and diagnostics must be performed to enable differential treatment. It is difficult to distinguish between a bulge and a hernia. LÄS MER

  4. 13. Adaptive Mesh Refinement and Simulations of Unsteady Delta-Wing Aerodynamics

    Författare :Yann Le Moigne; KTH; []
    Nyckelord :delta wing; high angle of attack; vortex; pitching; mesh refinement; UCAV; vortex sensor; tensor ofvelocity gradients;

    Sammanfattning : This thesis deals with Computational Fluid Dynamics (CFD)simulations of the flow around delta wings at high angles ofattack. These triangular wings, mainly used in militaryaircraft designs, experience the formation of two vortices ontheir lee-side at large angles of attack. LÄS MER

  5. 14. Deadlock Free Routing in Mesh Networks on Chip with Regions

    Författare :Rickard Holsmark; Shashi Kumar; Petru Eles; Axel Jantsch; Jönköping University; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Networks on Chip; Mesh Topology; Routing Algorithms; Wormhole Switching; Deadlock; Application Specific Routing; Systems engineering; Systemteknik; TECHNOLOGY;

    Sammanfattning : There is a seemingly endless miniaturization of electronic components, which has enabled designers to build sophisticated computing structureson silicon chips. Consequently, electronic systems are continuously improving with new and more advanced functionalities. LÄS MER

  7. 15. Audit of groin hernia repair

    Författare :Anders Kald; Lloyd M. Nyhus; Linköpings universitet; []
    Nyckelord :Groin hernia; inguinal hernia; complications; re-operation; recurrence; audit; cost-effectiveness; mesh; laparoscopy; MEDICINE; MEDICIN;

    Sammanfattning : Inguinal hernia repair is the most frequent procedure in general surgery. In the USA approximately 700,000 groin hernioplasties are carried out annually and accounts for almost US$ 3 billion in annual health care revenue. In Sweden approximately 20,000 hernia operations are performed annually and more than 3,000 of them are recurrent hernias. LÄS MER