Sökning: "Local composition"

Visar resultat 16 - 20 av 436 avhandlingar innehållade orden Local composition.

1. 16. An activity-coefficient model for electrolyte solutions

   Författare :Yunda Liu; Chalmers tekniska högskola; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; solid-liquid equilibria; Thermodynamics; Debye-Hückel theory; Local-composition concept; Vapor-liquid equilibria;

   Sammanfattning : .... LÄS MER

3. 17. Theoretical Considerations of Local Environment Effects in Alloys

   Författare :Tobias Marten; Igor Abrikosov; Josef Kudrnovský; Linköpings universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Condensed matter physics; Kondenserade materiens fysik;

   Sammanfattning : This thesis is devoted to a theoretical study of local environment effects in alloys. A fundamental property of a disordered system is that all chemically equivalent atoms are different due to their different chemical environments, in contrast to an ideal periodic solid where all the atoms that occupy equivalent positions in the crystal have exactly the same physical properties. LÄS MER

4. 18. Influence of Global Composition and Local Environment on the Spectroscopic and Magnetic Properties of Metallic Alloys

   Författare :Weine Olovsson; Igor A. Abrikosov; G. Malcolm Stocks; Uppsala universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Physics; core level shift; random alloy; first principles simulations; density functional theory; auger kinetic energy; Invar alloys; exchange parameter; classical Heisenberg Hamiltonian; complete screening; transition state; disorder broadening; Fysik; Physics; Fysik;

   Sammanfattning : Theoretical investigations of spectroscopic and magnetic properties of metallic systems in the bulk, as well as in nanostructured materials, have been performed within the density functional theory. The major part of the present work studies the differences between binding energies of electrons tightly bound to the atoms, the so-called core electrons (in contrast with the valence electrons), that is, core-level binding energy shift (CLS). LÄS MER

5. 19. Regional and local variation in plant species richness

   Författare :Cecilia Dupré; Uppsala universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Developmental biology; coastal meadows; deciduous forests; dry grasslands; grazing; habitat configuration; habitat quality; hump-shaped curve; life history traits; regional species pool; soil factors; Utvecklingsbiologi; Developmental biology; Utvecklingsbiologi; ekologisk botanik; Ecological Botany;

   Sammanfattning : In this thesis, I examine the variation in plant species richness along gradients of productivity and disturbance in grasslands and forest habitats in southern Sweden, and I compare the documented patterns with theoretical predictions. Moreover, I evaluate the relative importance of habitat quality and habitat configuration for the occurrence of field layer species in deciduous forests. LÄS MER

7. 20. Relativenobility of precipitated phases in stainless steels : Evaluation with a combination of local probing techniques

   Författare :Namurata Sathirachinda; Jinshan Pan; Thomas Ladwein; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Materials science; Teknisk materialvetenskap;

   Sammanfattning : Stainless steels often exhibit complex transformation and precipitation behaviour due to a high content of alloying elements. Secondary phases can be formed in the temperature range of 300-1000°C and are generally undesirable due to their detrimental effect on mechanical properties and corrosion resistance of stainless steels. LÄS MER