Sökning: "erosion"

Visar resultat 6 - 10 av 361 avhandlingar innehållade ordet erosion.

1. 6. On failure modelling in finite element analysis : material imperfections and element erosion

   Författare :Mattias Unosson; Larsgunnar Nilsson; Kjell Simonsson; Lars Olovsson; Anders Eriksson; Linköpings universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; finite element method; element erosion; material failure; material imperfections; crack-tip; Solid mechanics; Fastkroppsmekanik;

   Sammanfattning : This dissertation concerns failure modelling with material imperfections and element erosion in finite element analyses. The aim has been to improve the element erosion technique, which is simple to use and implement and also computationally inexpensive. LÄS MER

3. 7. Predicting surfacing internal erosion in moraine core dams

   Författare :Hans Rönnqvist; Anders Wörman; Hans Bergh; Kaare Høeg; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; internal erosion; internal stability; filters; moraine core; embankment dams; sinkholes; internal erosion assessment; Geoengineering and mining engineering; Geoteknik och gruvteknik;

   Sammanfattning : Dams that comprise broadly and widely graded glacial materials, such as moraines, have been found to be susceptible to internal erosion, perhaps more than dams of other soil types. Internal erosion washes out fine-grained particles from the filling material; the erosion occurs within the material itself or at an interface to another dam zone, depending on the mode of initiation. LÄS MER

4. 8. Cognitive erosion and its implications in Alzheimer’s disease

   Författare :Selina Mårdh; Thomas Karlsson; Anders Wallin; Linköpings universitet; []
   Nyckelord :Alzheimer’s disease; longitudinal study; mixed methods design; semantic memory; awareness; metacognition; central coherence; emotions; Alzheimers sjukdom; longitudinell studie; mixed methods design; semantiskt minne; medvetande; metakognition; central koherens; emotioner; Do Psychology;

   Sammanfattning : The aim of the present thesis was twofold, first to map the semantic memory decline in Alzheimer patients over time, second to take the patient’s perspective and create a multifaceted picture of the individual with Alzheimer’s disease through the study of memory, awareness, central coherence and emotions. Further issues concerned how Alzheimer individuals handled their cognitive erosion in everyday life and if they were well calibrated with their spouse in disease related matters. LÄS MER

5. 9. 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

7. 10. Landscape and soil erosion history in central Tanzania : a study based on lacustrine, colluvial and alluvial deposits

   Författare :Mats G. Eriksson; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Soil erosion; Soil degradation; Tanzania;

   Sammanfattning : .... LÄS MER