Search for dissertations about: "occurring"

Showing result 21 - 25 of 1526 swedish dissertations containing the word occurring.

  2. 21. Simulation of dynamic instabilities during high rate deformation of ductile bars and plates

    Author : Kristina Nilsson; Mekanik; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; numerical simulation; non-linear; wave propagation; multiple necking; necking; buckling; fracture; Mechanical engineering; Maskinteknik; finite elements; cohesive elements; dynamic; J2-flow theory; J2-deformation theory; viscoplastic; background inertia;

    Abstract : In this thesis, some of the phenomena occurring in plates and cylindrical bars subjected to dynamic loading are investigated. Numerical simulations using a dynamic finite element code are performed for a number of different sized specimens with various initial surface imperfections. Typically imposed loading velocities are in the range 10m/s.. READ MORE

  4. 22. New Insights in Adrenal Tumourigenesis

    Author : Rajani Maharjan; Peyman Björklund; Michaela Luconi; Uppsala universitet; []
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; cortisol producing adenomas; adrenocortical carcinomas; mutation; heterogeneity; PRKACA; TERT; CTNNB1; Molekylär genetik; Molecular Genetics;

    Abstract : Unilateral cortisol producing adenoma (CPA) is the most common cause of ACTH-independent Cushing’s syndrome and is surgically curable. On the other hand, adrenocortical carcinomas (ACCs) are rare and aggressive tumours. READ MORE

  5. 23. Human γ-trace. Primary structure, localization to neuroendocrine cells and concentration in body fluids

    Author : Helge Löfberg; Malmö Patologi; []
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; cystatin C; protein structure;

    Abstract : γ-Trace is a low molecular weight human protein with unknown function, occurring in body fluids. this thesis deals with the determination of the complete amino acid sequenceof human -trace, its localization to neuroendocrine cells and concentration in human body fluids at various ages. READ MORE

  6. 24. Tribology of elastomers

    Author : Mohammad Mofidi; Luleå tekniska universitet; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Machine Elements; Maskinelement;

    Abstract : In this work, the tribological behaviour of different sealing elastomers has been studied. The influence of aging of a sealing elastomer in different lubricants on its tribological behaviour has been investigated. Tribological behaviour of sealing elastomers in dry condition and the mechanisms occurring in run-in period have been studied. READ MORE

  7. 25. Electron microscopy studies of tungsten oxides in the range WO₃ - WO₂˔₇₂ : phase relations, defect structures, structural transformations and electrical conductivity

    Author : Wubeshet Sahle; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Oorganisk kemi; Volfram;

    Abstract : The article reviews recent studies of structural variations in the W-O system in the composition range of WO3-WO2.72. Several types of defect structures have been observed in high resolution electron microscopy studies and defect models have been proposed. READ MORE