Sökning: "Patrik Andersson"

Visar resultat 1 - 5 av 34 avhandlingar innehållade orden Patrik Andersson.

  1. 1. Four applications of stochastic processes : Contagious disease, credit risk, gambling and bond portfolios

    Författare :Patrik Andersson; Andreas Nordvall Lagerås; Håkan Andersson; Stewart N. Ethier; Stockholms universitet; []
    Nyckelord :NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; Stochastic processes; Mathematical statistics; Matematisk statistik; Mathematical Statistics; matematisk statistik;

    Sammanfattning : This thesis consists of four papers on applications of stochastic processes. In Paper I we study an open population SIS (Susceptible - Infective - Susceptible) stochastic epidemic model from the time of introduction of the disease, through a possible outbreak and to extinction. The analysis uses coupling arguments and diffusion approximations. LÄS MER

  3. 2. Development of new NMR techniques and structural characterization of complexes between the N-terminal domain of the E. coli arginine repressor and operator DNA

    Författare :Patrik Andersson; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :;

    Sammanfattning : This thesis includes the development of new solution NMR methods for the study of biomolecules and the characterization of complexes between the N-terminal domain of the E. coli arginine repressor (ArgR-N) and operator DNA. LÄS MER

  4. 3. Functional role of a constitutively active dioxin/Ah receptor in a transgenic mouse model

    Författare :Patrik Andersson; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :Dioxin Ah receptor; TCDD; dioxin; stomach tumor; osteopontin; peritoneal B1 B cells; transcription factor; gene expression;

    Sammanfattning : The dioxin/ Aryl hydrocarbon receptor is a ligand-activated transcription factor that mediates most (if not all) of the toxic effects of the group of highly potent environmental pollutants collectively called dioxins and PCBs, including the highly toxic compound 2,3,7,8tetrachlorodibenzo-p-dioxin (TCDD). The toxic effects include immune suppression, endocrine disruption, impaired reproduction and carcinogenesis. LÄS MER

  5. 4. Mechanisms of tumor microenvironment in promoting metastasis

    Författare :Patrik Andersson; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :;

    Sammanfattning : Tumor tissues contain diverse cell populations that relentlessly cross-communicate with each other in the tumor microenvironment. In addition to malignant cells, infiltration of other host cells including inflammatory cells, fibroblasts, and cells in the vessel walls in tumors significantly contribute to tumor growth and metastasis. LÄS MER

  7. 5. High Frequency Tyre Vibrations

    Författare :Patrik Andersson; Chalmers University of Technology; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; ENGINEERING AND TECHNOLOGY; local deformation; adhesion; tyre model; air pumping; parameter study; tyre road noise; tyre road prediction models; tyre noise;

    Sammanfattning : High frequency (above 1 kHz) noise generation from the tyre/road interaction is still not fully understood and accurately modelled.Two noise generation mechanisms previously suggested in the literature are reviewed: air pumping and noise generation cased by adhesive effects between the tyre tread and road surface. LÄS MER