Sökning: "mats bergström"

Visar resultat 1 - 5 av 17 avhandlingar innehållade orden mats bergström.

1. 1. Performance evaluation and improvements of quantitation accuracy in transmission and positron emission computer assisted tomography

   Författare :Mats Bergström; Stockholms universitet; []
   Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES;

   Sammanfattning : A prerequisite for the full utilization of transmission and positron emission computer assisted tomography in research and clinical practice, is a deep understanding of the physical properties and limitations of the techniques. The very complex performance of the tomograph, encountered in a diagnostic situation, can be appreciated subjectively by an experienced observer. LÄS MER

3. 2. Från svensk malmexport till utländsk etablering : Grängesbergsbolagets internationalisering 1953-1980

   Författare :Göran Bergström; Tom Petersson; Mats Larsson; Susanna Fellman; Uppsala universitet; []
   Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Internationalisation; learning process; investment strategies; iron and steel industry; market integration; mining; business history; path dependence; internationalisation theory; Lamco; Economic history; Ekonomisk historia; Ekonomisk historia; Economic History;

   Sammanfattning : The main purpose of this thesis is to analyze the internationalisation of the Grängesberg Company from 1953 to 1980. The strategies that the company used and the knowledge it gained by participating in international mining projects are studied. The first and largest mining activity abroad was the Lamco project in Liberia. LÄS MER

4. 3. A Search for the Masked Mechanism Behind IgG-Mediated Suppression of Antibody Responses

   Författare :Joakim Bergström; Birgitta Heyman; Jenny Hallgren Martinsson; Frida Henningsson Johnson; Mats Bemark; Uppsala universitet; []
   Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; FcγR; complement; sheep erythrocytes; IgG-mediated immune suppression; rhesus prophylaxis; rhesus D antigen; germinal center; Immunologi; Immunology;

   Sammanfattning : Antibodies passively administered together with their specific antigen can enhance or suppress the specific antibody response. This phenomenon is known as antibody feedback regulation. Whether this modulation causes up- or downregulation of the antibody response depends both on the antibody isotype and the antigen used. LÄS MER

5. 4. Influence of microstructure on fatigue and ductility properties of tool steels

   Författare :Mats Randelius; Rolf Sandström; Jens Bergström; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Tool steels; fatigue; ductility; carbides; carbide cluster; inclusion; size distribution; modelling; FEM; Metallurgical process engineering; Metallurgisk processteknik;

   Sammanfattning : Fatigue and ductility properties in various tool steels, produced by powder metallurgy, spray forming or conventionally ingot casting, have been analysed experimentally and successfully compared to developed models. The models are able to predict the fatigue limit and cause for fatigue fracture, and strain- and stress-development until fracture during the ductile fracture process respectively. LÄS MER

7. 5. Palaeosurfaces and palaeovalleys on North Atlantic previously glaciated passive margins : reference forms for conclusions on uplift and erosion

   Författare :Johan M. Bonow; Karna Lidmar-Bergström; Clas Hättestrand; Jens-Ove Näslund; Mats Olvmo; Adrian Hall; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; palaeosurface; palaeovalley; uplift; valley; incision; glacial erosion; weathering; Neogene; southern Norway; West Greenland; Earth sciences; Geovetenskap;

   Sammanfattning : Palaeosurfaces and palaeovalleys are landforms under destruction in the present climate and/or tectonic regime, and thus mainly reflect processes not active today. Uplifted palaeosurfaces exist along the formerly glaciated passive continental margins around the North Atlantic. LÄS MER