Sökning: "stress enhanced diffusion"

Visar resultat 1 - 5 av 12 avhandlingar innehållade orden stress enhanced diffusion.

1. 1. Diffusion in Bone Tissue

   Författare :Gustav Lindberg; Hållfasthetslära; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; bone growth; diffusion; stress enhanced; finite element method; steady-state; periosteal membrane; diffusion in bovine bone; diffusion experiment; Conductivity measurement; Fick’s law; Fourier series; Kalman filter; transient solution;

   Sammanfattning : In order to prevent or modify the processes of bone degeneration the modeling and remodeling of bone tissue must be better understood. In this thesis it is assumed that the primary condition leading to bone growth is a change of the chemical environment caused by transport of matter resulting from stress driven diffusion. LÄS MER

3. 2. On the Growth of Bone through Stress Driven Diffusion and Bone Generation Processes

   Författare :Gustav Lindberg; Hållfasthetslära; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; bone growth; Osteogenesis; Diffusion in bone; stress enhanced diffusion; Ginzburg-Landau; phase-field; diffusion experiment; Conductivity; Kalman filter; finite element method; Fourier series; Fick’s law; Osteology;

   Sammanfattning : In order to prevent or modify bone degeneration due to rest or due to diseases such as osteopenia and osteoporosis, the modeling and remodeling of bone tissue must be better understood. In this thesis it is assumed that the primary condition leading to bone growth is a change of the chemical environment caused by transport of matter resulting from stress driven diffusion. LÄS MER

4. 3. Endothelial Nitric Oxide in the Control of Glomerular Hemodynamics

   Författare :János Pittner; Daniel H. Casellas; Uppsala universitet; []
   Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Cell biology; Juxtamedullary nephron; afferent arteriole; nitric oxide; endothelial calcium; diaminofluoresceins; fura-2; autoregulation; shear stress; flow; videomicroscopy; Cellbiologi; Cell biology; Cellbiologi; Physiology; fysiologi;

   Sammanfattning : The afferent arteriole of the kidney is a unique vascular segment: it is the effector of the renal hemodynamic autoregulation. The use of the isolated, perfused juxtamedullary nephron preparation makes it possible to visualize the afferent arteriole while preserving its tissue surroundings and the functional integrity of the nephron. LÄS MER

5. 4. On Peritectic Reactions and Transformations and Hot Forming of Cast Structures

   Författare :Hani Nassar; Hasse Fredriksson; Rian Dippenaar; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; peritectic reactions; massive transformations; thermal analysis; Fe-base alloys; steels; growth irregularities; hot forming; compression testing; flow stress; grain size.; Metallurgical manufacturing engineering; Metallurgisk produktionsteknik; Metallurgical process engineering; Metallurgisk processteknik;

   Sammanfattning : This thesis deals with peritectic reactions and transformations that occur during the solidification of many alloys. Peritectics are believed to be a major cause of crack-formation in many steels, thus, good knowledge of the mechanisms by which these phenomena occur is essential for preventing such defects. LÄS MER

7. 5. German second home owners in the Swedish countryside : on the internationalization of the leisure space

   Författare :Dieter K. Müller; Umeå universitet; []
   Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Tourism; second homes; countryside; Sweden; Germany; tourist motivation; innovation diffusion; integration; gentryfication; GIS;

   Sammanfattning : Between 1991 and 1996 the number of German second home owners in Sweden increased from about 1,500 to more than 5,500. The purpose of this thesis is to give a comprehensive description and analysis of the German cottage purchases in Sweden, 1991-96. LÄS MER