Sökning: "entropi"

Visar resultat 1 - 5 av 14 avhandlingar innehållade ordet entropi.

  1. 1. Conceptual metaphors in learning and teaching entropy : adopting a cognitive semantic approach in science education research

    Författare :Fredrik Jeppsson; Helge Strömdahl; Tamer Amin; Roland Kjellander; David Hammer; Linköpings universitet; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Science education; thermodynamics; semantics; conceptual metaphors; Naturvetenskapernas didaktik; termodynamik; entropi; semantik; begreppsliga metaforer;

    Sammanfattning : Over the last 20 years there has been an extensive amount of research on science learning conducted from a “knowledge-in-pieces” or “resources” perspective. One of the main goals of that research has been to identify and characterize available cognitive knowledge resources that can be productive components of scientific understanding. LÄS MER

  3. 2. Modeling of inorganic ions in aqueous solution

    Författare :Vidar Aspelin; Beräkningskemi; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; molekylsimulering; statistisk mekanik; termodynamik; oorganiska joner; vattenlösningar; Kirkwood-Buff-teori; beräkningar av fri energi; molecular simulation; statistical mechanics; thermodynamics; inorganic ions; aqueous solutions; Kirkwood-Buff theory; free energy calculations;

    Sammanfattning : Essentially all chemical processes and reactions occurring in the environment take place in the presence of ions. In water, ions set the conditions for how other dissolved particles interact. Ions are also directly involved in chemical reactions affecting the climate such as ozone depletion. LÄS MER

  4. 3. Creep modeling and first-principles investigation of high-temperature alloys

    Författare :Jing Zhang; Pavel A. Korzhavyi; Rolf Sandström; Gunther Eggeler; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Austenitic stainless steels; Nickel-based superalloys; Fundamental creep models; EMTO-CPA method; Quasi-harmonic Debye model; Thermo-mechanical properties; High temperatures.; Teknisk materialvetenskap; Materials Science and Engineering;

    Sammanfattning : Stainless steels and nickel-based superalloys are materials that have been widely used to manufacture components servicing at high temperatures. Creep strength is one of the most important properties in such conditions. LÄS MER

  5. 4. Two-dimensional Nanocomposites Based on Cellulose Nanofibrils and Graphene Oxide

    Författare :Hanieh Mianehrow; Lars Berglund; Aji Mathew; KTH; []
    Nyckelord :Cellulose nanofibrils; graphene oxide; orientation; reinforcement; oxygen barrier; bio-nanocomposite; moisture; molecular adhesion; interfacial shear strength.; Nanocellulosa; grafenoxid; orientering; förstärkning; syrebarriär; bionanokomposit; fukt; molekylär adhesion; skjuvhållfasthet hos gränsytan.; Fiber- och polymervetenskap; Fibre and Polymer Science;

    Sammanfattning : Two-dimensional (2D) nanocomposites based on cellulose nanofibrils (CNF) and 2D nanomaterials are of interest as sustainable materials combining functional and structural properties. To achieve reinforcement effects from 2D nanomaterials, their orientation and dispersion state in the CNF matrix are important. LÄS MER

  7. 5. QM/MM free-energy perturbation and other methods to estimate ligand-binding affinities

    Författare :Martin Olsson; Beräkningskemi; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Computer-aided drug design; protein–ligand binding; molecular dynamics; free-energy perturbation; QM MM; convergence;

    Sammanfattning : Experimental drug discovery is very time-consuming, risky and comes at a huge cost, typically several billion USD per drug. Even though decades of experimental drug discovery have provided cures of many diseases, there are still diseases for which there is no effective drug available. LÄS MER