Sökning: "Göran Magnusson"

Visar resultat 1 - 5 av 12 avhandlingar innehållade orden Göran Magnusson.

  1. 1. Creep modelling of particle strengthened steels

    Författare :Hans Magnusson; Rolf Sandström; Göran Engberg; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Particle strengthening; dislocation climb; ferritic steels; dislocation evolution; creep rate modelling; Materials science; Teknisk materialvetenskap;

    Sammanfattning : Materials to be used in thermal power plants have to resist creep deformation for time periods up to 30 years. The role of alloying elements for creep strength of 9-12% Cr steels is analysed. The creep strength in these steels relies on minor additions of alloying elements. LÄS MER

  3. 2. On the design of hybrid DC-breakers consisting of a mechanical switch and semiconductor devices

    Författare :Jesper Magnusson; Göran Engdahl; Staffan Norrga; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; DC; circuit breaker; hybrid breaker; DC systems; DC; brytare; hybridbrytare; likström;

    Sammanfattning : The interest of using direct current in networks for both transmission and distribution of power is increasing due to the higher efficiency compared to the alternating current used today. As no natural zero crossings exist in direct current, the interruption of fault currents becomes a challenge. LÄS MER

  4. 3. Studies on Current Commutation in Hybrid DC-breakers

    Författare :Jesper Magnusson; Göran Engdahl; Magne Runde; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Commutation; Hybrid DC-breakers; Electrical Engineering; Elektro- och systemteknik;

    Sammanfattning : Compared to conventional AC-circuit breakers, a DC-breaker has to act fast and force the current down to zero. Many different DC-breaker topologies are available, and this thesis is focused on the hybrid DC-breaker comprising a mechanical switch and high power semiconductors. LÄS MER

  5. 4. Inner ear proteomics and barriers : Clinical and experimental findings

    Författare :Jesper Edvardsson Rasmussen; Göran Laurell; Per Olof Eriksson; Helge Rask-Andersen; Jonas Bergquist; Måns Magnusson; Uppsala universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Vestibular schwannoma; Hearing loss; Inner ear; Proteome; Perilymph; Endolymph; Furosemide; NKCC1; Fetuin-A; Complement component factor-H realted protein 2; CFHR2; Inflammation; MRI; Oto-Rhino-Laryngology; Oto-rhino-laryngologi; Medical Cell Biology; Medicinsk cellbiologi;

    Sammanfattning : Hearing is important in many aspects of life, including communication, assessing one’s surroundings, entertainment and social interaction. Hearing loss is common and according to the Global Burden of Disease Study, 5% of the global population require hearing rehabilitation (1). LÄS MER

  7. 5. Factors affecting the physical characteristics of arterio-venous fistula in patients with renal failure

    Författare :Ursula Hadimeri; Sven Göran Fransson; Bernd Stegmayr; Elisabeth Kenne Sarenmalm; Anders Magnusson; Linköpings universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES;

    Sammanfattning : Background and PurposeA patent access is vital for a dialysis patient. The arterio-venous fistula (AVF), the most important access for haemodialysis (HD), is frequently affected by extensive complications such as stenosis and occlusions. LÄS MER