Sökning: "Vakanser"

Hittade 5 avhandlingar innehållade ordet Vakanser.

  1. 1. Vakanser på bostadsmarknaden : i praktik och teori

    Författare :Kerstin Klingborg; Mats Bohman; Hans Wijkander; KTH; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Vakanser; Lediga lägenheter; Bostadshyresmarknaden; Prisanpassningar; Kvantitetsanpassningar; Naturlig vakansgrad; Observerad vakansgrad; Kortsiktig jämvikt; Långsiktig jämvikt;

    Sammanfattning : Denna licentiatavhandling handlar om lediga hyreslägenheter. I avhandlingens första del beskrivs och analyseras dels hur problemet med lediga lägenheter ser ut på den svenska bostadshyresmarknaden under åren 1990-1994 och dels hur problemet hanteras av svenska kommunala bostadsföretag. LÄS MER

  3. 2. Characterisation of mechanical and thermal properties of tungsten for high power spallation target applications

    Författare :Jemila Habainy; Materialteknik; []
    Nyckelord :Utmattning; Termisk diffusivitet; Volfram; Spallation; Strålningseffekter; ESS; Oxidation; Mekaniska egenskaper; Mechanical Properties; Thermal diffusivity; Tungsten; ESS; Spallation target; Irradiation effects; Fatigue; Oxidation;

    Sammanfattning : The European Spallation Source (ESS), which is currently under construction in Lund, will use pure tungsten as the spallation neutron target. The tungsten will be irradiated by a 2 GeV proton beam, pulsed at a repetition rate of 14 Hz. LÄS MER

  4. 3. Modeling the Microstructure Evolution During and After Hot Working in Martensitic Steel

    Författare :Nima Safara Nosar; John Ågren; Göran Engberg; Hans-Olof Andrén; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Modeling; Martensitic steel; Carbides; Carbide size distribution; Carbide volume fraction; Carbide shape factor; Modellering; Martensitiskt stål; karbider; karbidstorleksfördelning; karbidvolymfraktion; karbidformfaktor; Teknisk materialvetenskap; Materials Science and Engineering;

    Sammanfattning : In this study, the goal is to predict the microstructure evolution during and after the hot working of a martensitic stainless steel with 13% chromium using a physically-based model in the form of a MATLAB toolbox. This model is based on dislocation density theory and consists of coupled sets of evolution equations for dislocation, vacancies, recovery, recrystallization, and grain growth. LÄS MER

  5. 4. Creep modeling and first-principles investigation of high-temperature alloys

    Författare :Jing Zhang; Pavel A. Korzhavyi; Rolf Sandström; Gunther Eggeler; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Austenitic stainless steels; Nickel-based superalloys; Fundamental creep models; EMTO-CPA method; Quasi-harmonic Debye model; Thermo-mechanical properties; High temperatures.; Teknisk materialvetenskap; Materials Science and Engineering;

    Sammanfattning : Stainless steels and nickel-based superalloys are materials that have been widely used to manufacture components servicing at high temperatures. Creep strength is one of the most important properties in such conditions. LÄS MER

  7. 5. Phase Separation in Stainless Steels Studied by Small-angle Neutron Scattering

    Författare :Xin Xu; Peter Hedström; Joakim Odqvist; John Ågren; Cristelle Pareige; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Fe-Cr alloys; stainless steels; spinodal decomposition; phase separation; small-angle neutron scattering; mechanical properties; Teknisk materialvetenskap; Materials Science and Engineering;

    Sammanfattning : Fe-Cr based steels, i.e. stainless steels, possessing a combination of excellent corrosion resistance and good mechanical properties, have indispensable applications ranging from low-end cooking utensils, to sophisticated components for nuclear power plants. LÄS MER