Sökning: "Tube shape"

Visar resultat 6 - 10 av 37 avhandlingar innehållade orden Tube shape.

  1. 6. Optical methods for tympanic membrane colour and shape assessment

    Författare :Mikael Sundberg; Linköpings universitet; []
    Nyckelord :MEDICINE; MEDICIN;

    Sammanfattning : Otitis media is one of the most common diseases of childhood. Increasing antibiotic resistance has lead to awareness of the importance of the diagnostic accuracy in otitis media. The recommended treatment of acute otitis media (AOM) involves antibiotics whereas in otitis media with effusion (OME) it does not. LÄS MER

  3. 7. On focusing of shock waves

    Författare :Veronica Eliasson; Nicholas Apazidis; John Dear; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; converging shock; Euler equations; imploding shock; Mach reflection; regular reflection; shock focusing; shock tube; Fluid mechanics; Strömningsmekanik;

    Sammanfattning : Both experimental and numerical investigations of converging shock waves have been performed. In the experiments, a shock tube was used to create and study converging shock waves of various geometrical shapes. Two methods were used to create polygonally shaped shocks. LÄS MER

  4. 8. On focusing of strong shock waves

    Författare :Veronica Eliasson; Nicholas Apazidis; Nils-Erik Molin; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; shock focusing; imploding shock; converging shock; reflected shock; annular shock tube; Fluid mechanics; Strömningsmekanik;

    Sammanfattning : Focusing of strong shock waves in a gas-filled thin test section with various forms of the reflector boundary is investigated. The test section is mounted at the end of the horizontal co-axial shock tube. Two different methods to produce shock waves of various forms are implemented. LÄS MER

  5. 9. Numerical study of flame dynamics

    Författare :Arkady Petchenko; Vitaly Bychkov; Leonid Kagan; Umeå universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; combustion; Direct Numerical Simulation DNS ; turbulence; flame-vortex interaction; flame acceleration; flame-acoustic interaction; Physics; Fysik;

    Sammanfattning : Modern industrial society is based on combustion with ever increasing standards on the efficiency of burning. One of the main combustion characteristics is the burning rate, which is influenced by intrinsic flame instabilities, external turbulence and flame interaction with walls of combustor and sound waves. LÄS MER

  7. 10. Computational Modeling of the Vocal Tract : Applications to Speech Production

    Författare :Saeed Dabbaghchian; Olov Engwall; Sidney Fels; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; vocal tract; upper airway; speech production; biomechanical model; acoustic model; vocal tract reconstruction; Tal- och musikkommunikation; Speech and Music Communication;

    Sammanfattning : Human speech production is a complex process, involving neuromuscular control signals, the effects of articulators' biomechanical properties and acoustic wave propagation in a vocal tract tube of intricate shape. Modeling these phenomena may play an important role in advancing our understanding of the involved mechanisms, and may also have future medical applications, e. LÄS MER