Sökning: "Smooth transition"

Visar resultat 16 - 20 av 94 avhandlingar innehållade orden Smooth transition.

  1. 16. Testing the unit root hypothesis in nonlinear time series and panel models

    Författare :Rickard Sandberg; Handelshögskolan i Stockholm; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : The thesis contains the four chapters: Testing parameter constancy in unit root autoregressive models against continuous change; Dickey-Fuller type of tests against nonlinear dynamic models; Inference for unit roots in a panel smooth transition autoregressive model where the time dimension is fixed; Testing unit roots in nonlinear dynamic heterogeneous panels. In Chapter 1 we derive tests for parameter constancy when the data generating process is non-stationary against the hypothesis that the parameters of the model change smoothly over time. LÄS MER

  3. 17. Essays on autoregressive conditional heteroskedasticity

    Författare :Annastiina Silvennoinen; Handelshögskolan i Stockholm; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES;

    Sammanfattning : .... LÄS MER

  4. 18. Studies on mechanisms in liver fibrosis

    Författare :Nils Kinnman; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :bile duct epithelial cell; chernotaxis; cholestasis; cystic fibrosis; cystic fibrosis transmembrane conductance regulator; endothelin; hepatic stellate cell; hepatitis C virus; liver fibrosis; platelet-derived growth factor; platelet-derived growth factor receptor [beta]; smooth muscle [alpha]-actin; transforming growth factor- [beta]; tumor necrosis factor-[alpha];

    Sammanfattning : The aim of the present study was to elucidate mechanisms involved in liver fibrogenesis, the wound healing response of the liver to chronic injury. A role for TNF-[alpha] and all three isoforms of TGF-[beta] in the pathogenesis of hepatitis C related liver disease was suggested by the finding of increased expression of TGF-[beta]1-3, latent TGF-[beta] binding protein (LTBP), and TNF-[alpha] by immunohistochemistry in areas of inflammation and fibrosis in liver tissue from untreated patients with hepatitis C. LÄS MER

  5. 19. Essays on nonlinear time series analysis and health economics

    Författare :Anna Ovanfors; Handelshögskolan i Stockholm; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES;

    Sammanfattning : .... LÄS MER

  7. 20. Ramp Josephson junctions based on NdBa2Cu3O7-δ electrodes and PrBa2Cu3O7-δ barriers

    Författare :Mikael Sjöstrand; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; PBCO; high temperature; superconducting device; ramp Josephson junction; NBCO; pulsed laser deposition; thin film;

    Sammanfattning : We report on smooth high quality c-axis orientedNdBa2Cu3O7-δ (NBCO) superconducting thin filmsgrown on (001) SrTiO3 substrates using pulsed laser deposition.The transition temperature of these NBCO films was around 89.5 Kand the root-mean-square (RMS) surface roughness was 0.75 nm for150 nm thick films. LÄS MER